Getting direct experience through volunteering or working in healthcare is essential for understanding your field, showing commitment, and giving back to the community. Many health professions have specific requirements for the type and number of patient care or service hours needed—be sure to research expectations for your intended path and prospective schools.
When reviewing applications, health profession programs consider not only the number of hours, but also the length of time, depth of involvement, and what you learned from your experiences. Sustained and meaningful roles—especially those where you reflect, grow, and make a real impact—tend to matter more than brief or one-time activities. Keep a journal of your activities and insights. If you pursue short-term or international opportunities, balance them with long-term local service, and ensure all clinical experiences are supervised and ethical.
The resources below will help you explore a wide range of healthcare experiences in Ann Arbor, across Michigan, and beyond. Not all organizations always need new volunteers, so contact each directly to inquire about current opportunities. For questions or strategy, reach out to your pre-health advisor or the University Career Center.
Pre-Medicine & General Pre-Health Experiences
Clinical Experience
- Local Hospitals & Health Systems
- Michigan Medicine Volunteer Program – Clinical service examples: University Hospital, C.S. Mott Children’s, Kellogg Eye Center, Cancer Center, Geriatrics Center.
- Trinity Health Michigan (Ann Arbor)
- VA Medical Center (Ann Arbor) (North Campus; bus accessible from Central)
- Health Clinics
- Home Health & Assisted Living
- Scribe Opportunities
- Opportunities in Hospitals Across Michigan
Volunteer & Community Service
- General Community & Nonprofit Organizations
- Ginsberg Center Connect2Community Portal – Search for up-to-date volunteer opportunities with community partners across the Ann Arbor area.
- U-M Comprehensive Cancer Center Volunteer Program
- Center for Eating Disorders (Ann Arbor)
- Ronald McDonald House of Ann Arbor
- Women’s Health Resource Center (Ann Arbor)
- Washtenaw County Public Health Services
- Humane Society of Huron Valley
- VolunteerMatch – Search for health-related volunteer roles nationwide.
- Karmanos Cancer Institute (Detroit)
- Mental & Behavioral Health
- Public Health & Health Outreach
- Senior Services, Assisted Living, & Hospice
- Pediatric & Family Organizations
Research Opportunities
- University of Michigan Research Programs
- Undergraduate Research Opportunity Program (UROP)
- UROP Summer Research Programs
- Psychology Dept. Research Opportunities
- Summer Undergraduate Research in Engineering (SURE)
- Summer Research Opportunity Program (SROP)
- Pre-MSTP Summer Program (UM-SMART)
- Cardiovascular Center Summer Research Fellowship
- REU in Mathematics
- REU in the Chemical Sciences
- REU at the Biological Station
- REU at CERN (Physics)
- REU in Biophysics
- REU Program In Climate and Space Science Observation (PICASSO)
- Perrigo/Life Sciences Institute (LSI) Summer Fellows Program
- Molecular and Integrative Physiology Summer Research Fellowship (SURF)
- STEP in Digestive and Metabolic Physiology
- Local & Regional Research Programs
- National Research Opportunities
- AAMC Enrichment Programs on Medical School Campuses
- Amgen Scholars Program
- Compilation of Biomedical Research Opportunities Nationwide (Fred Hutch)
- Compilation of Co-op/Internship Opportunities (U. of Rochester)
- CDC Public Health Internships, Fellowships, etc.
- Pathways to Science
- National Science Foundation: Research Experiences for Undergraduates (REU)
- REU Opportunities
- National Alliance of Research Associate Programs (NARAP)
- NIH Postbaccalaureate IRTA
- AAMC Summer Undergraduate Research Programs by School
- Summer Health Professions Education Program
- Fermilab Internships
- WebGURU Guide to Undergraduate Research
- EDUMED Summer Research and Internship Opportunities for Undergraduates
Gap Year & Post-Bacc Programs
- Review our Post-Bacc Programs webpage for more resources and insights
- Service Corps & Fellowships
- AmeriCorps State and National (9–12 months)
- AmeriCorps NCCC (10 months)
- AmeriCorps VISTA (1 year)
- City Year (1 year)
- Citizen Schools National Teaching Fellowship (2 years)
- FoodCorps (1 year)
- Teach for America (2 years)
- Project Horseshoe Farm Fellowship (13 months, community-based)
- U.S. Schweitzer Fellows Programs (1 year)
- Global Health Corps (year-long, health equity-focused)
- Peace Corps (2 years, international)
- STEM and Medically-Related Fellowships (UM compilation)
- Clinical & Healthcare Jobs
- Michigan Medicine Job Postings
- Planned Parenthood Clinic Assistant
- HealthCorps
- GVSU Scribe Academy
- ScribeAmerica
- Elite Medical Scribes
- iScribeMD
- Standardized Patient Instructor (U-M Medical School)
- Medical Interpreter (U-M Health System)
- Internships
- Research Opportunities (Post-Bacc & Gap Year)
- General Job & Gap Year Resources
- CareerOneStop
- CoolWorks - Cool Works helps you find seasonal jobs in amazing places—like national parks, ski resorts, ranches, camps, theme parks, and tour companies.
- Idealist - Resource for nonprofit jobs, internships, fellowships, and volunteer opportunities.
- Indeed.com
- MedHunters - MedHunters is the world's largest healthcare job board.
- Medzilla - Job posting site in the biotechnology, medicine and health care industries. Extensive list of related links also available.
- One Day, One Job - The insider’s guide to unique and exciting entry level job and career opportunities for recent college graduates. The daily employer profiles highlight the best entry-level jobs and offer innovative job search tips.
- One Small Planet - A site for worldwide travel and adventures. Includes international work, study, volunteer, and travel resources.
- ServeNet (VolunteerMatch) - Includes links to grants and other resources for volunteer work.
International Opportunities
Important Note: Many international programs are not affiliated with U-M and require independent vetting for legitimacy, cost, and student safety. Always consult a pre-health advisor before enrolling in an overseas volunteer/observership experience.
- Global Health & Service Organizations
- U-M Center for Global and Intercultural Study (CGIS) – U-M’s hub for international study abroad, with summer and semester health/global studies programs.
- M-Compass (U-M Study Abroad Database) – Filter for “health” or “science” programs.
- LSA Global Experiences – Listings for internships, research, and volunteer work worldwide (incl. remote/virtual options).
- International Volunteering & Shadowing
- Projects Abroad – Health and medical placements (various countries).
- GoOverseas.com – Aggregate search tool for international volunteering, internships, hospital-based experiences, and research.
- GVI (Global Vision International) – Medical & public health internships and service.
- UN Volunteers – Volunteer roles worldwide, including health support.
- International Federation of Medical Students Associations (IFMSA) – International medical exchanges and public/global health projects.
- Global Health Career & Enrichment Programs
- Volunteer opportunities in the health care field that are primary care based
- GoAbroad.com: Health Internships Abroad
- Peace Corps – Public health, education, and medical assistance roles (2 years, wide range of settings).
- Child Family Health International (CFHI) – Service-learning, clinical, public health, and global health education assignments across the globe.
Pre-Physician Assistant
Direct Patient Care Experience (PA Track)
Physician assistant programs strongly emphasize paid, hands-on direct patient care experience (DPCE/PCE). Most PA programs require between 500–2,000+ hours for admission. Qualifying jobs typically include:
- Patient Care Technician (PCT) or Nursing Assistant (CNA)
- Medical Assistant (MA)
- EMT or Paramedic
- Scribe (some programs)
- Phlebotomist
- Physical Therapy Aide, Occupational Therapy Aide
- Mental Health Technician, Home Health Aide, etc.
For more about finding these opportunities, see the General Pre-Health Clinical Experience resources above.
Each program counts eligible hours and roles differently—carefully check requirements for every school you plan to apply to. With that said, the The National Alliance of Research Associates Programs has a spreadsheet with a lot of information collected about each PA program's admissions requirements, including a tab dedicated to clinical experience. This will give you an idea of the required number of hours for a program and if some levels of experience are valued more than others. Note: This is not a definitive or exhaustive resource, nor is it guaranteed to be 100% accurate. Always check with the individual programs for their admissions requirements.
PA Profession Resources & Career Exploration
- American Academy of Physician Associates (AAPA) – National organization for the PA profession: clinical info, pre-PA membership, events, and news.
- Physician Assistant Education Association (PAEA) – Lists accredited PA programs, publishes admissions info and data, and oversees the CASPA application.
- CASPA – Central Application Service for Physician Assistants – Application instructions, deadlines, and technical support.
- Physician Assistant vs. Nurse Practitioner vs. Medical Doctor – A comparison chart of the different requirements academically and professionally for these three healthcare pathways.
Pre-Dental
Shadowing & Observation
- Ann Arbor Dental Offices (Contact directly for local shadowing/observation):
Tip: Most private practices are open to hosting pre-dental students as observers if you reach out with a concise, professional request.
- Michigan Medicine Clinics:
- Low-Cost & Community Dental Centers:
These clinics sometimes host volunteers or allow observation of services for pre-dental students, especially those interested in public health dentistry.
- National Dental Shadowing Directories & Tools:
- ADEA GoDental – National advice on finding, approaching, and making the most of dental shadowing.
- Michigan Dental Association “Find-a-Dentist” Tool – Search for local practicing dentists open to contact.
Tip: Not all offices are currently accepting observers—always check first, and consider remote/virtual shadowing if local opportunities are limited.
Volunteering & Community Outreach
- Local Ann Arbor Non-Profits and Low-Cost Dental Clinics
- Washtenaw Children's Dental Clinic – Occasionally needs student volunteers for outreach, education, or non-clinical support.
- Hope Clinic Dental Program (Ypsilanti) – May accept student volunteers for administrative support or special events.
- National & Community-Based Outreach Programs
- Give Kids A Smile – Major national program, often with Michigan and Detroit-area events, providing free dental care to children. Local chapters often need volunteers.
- Mission of Mercy – Provides large-scale dental care events; check for Michigan or Midwest events.
- National Network of Oral Health Access – Public/dental health education and outreach opportunities.
Research in Dental/Oral Health
- U-M School of Dentistry & Campus Research
- U-M School of Dentistry Research – Explore ways to participate in dental and oral health research with U-M faculty and labs.
- Undergraduate Research Opportunity Program (UROP) – Connects undergrads with research projects campus-wide, including oral health.
- Perrigo/Life Sciences Institute (LSI) Summer Fellows Program – Life sciences research, sometimes including dental topics.
- U-M Medical School Undergraduate Summer Research
- National Research & Summer Fellowship Programs
- ADEA Academic Dental Careers Fellowship Program (ADEA ADCFP)
- Summer Health Professions Education Program (SHPEP) – Free, multi-site academic enrichment and career exposure for undergrads from disadvantaged or underrepresented backgrounds (including the U-M, UCLA, Columbia, Louisville, and other top dental schools).
- Advice & Getting Started
- Reach out directly to dental faculty or research program coordinators; mention your specific interest in oral/dental health research, and ask about current or upcoming openings.
- Attend annual research fairs, information sessions, and workshops offered by the School of Dentistry, UROP, or ADEA to learn about projects and application tips.
Summer & Enrichment Programs
- U-M & Michigan-Based Programs
- U-M Profile for Success (Dental Track) – Six-week summer program targeting students from disadvantaged backgrounds and underrepresented minorities, preparing applicants to be competitive dental school candidates.
- University of Detroit Mercy Summer Enrichment Program – Enrichment for aspiring dental students including clinical observation, professional development, and admissions prep.
- National Summer and Pathway Programs
- Summer Health Professions Education Program (SHPEP) – Free, multi-site academic enrichment and career exposure for undergrads from disadvantaged or underrepresented backgrounds (including the U-M, UCLA, Columbia, Louisville, and other top dental schools).
- UConn Passport to Dentistry Program
- NYU College of Dentistry Summer Practicum
- University of Washington SHPEP
- VCU Summer Academic Enrichment Program (SAEP)
- UCLA SHPEP
- Texas A&M Summer Pre-Dental Enrichment Program (SPEP)
- VCU Summer Academic Enrichment Program (SAEP)
- Marquette Pre-Dental Scholars Program
Many summer programs open applications between December and February.
For national and campus program application help, meet with a U-M pre-health advisor or review admissions strategies with the Pre-Dental Association.
Pre-Genetic Counseling
Observation & Shadowing
- Finding Shadowing Opportunities
- Due to patient confidentiality, shadowing genetic counselors can be rare—explore both in-person and virtual alternatives.
- NSGC “Find a Genetic Counselor” Search Tool – Identify genetic counselors in Michigan or nationally who may host students for informational interviews or (with permission) group observing.
Volunteering & Advocacy Experience
- Crisis Counseling & Support Roles
- Ozone House Youth and Family Services – 40-hour training required for crisis line counseling.
- Shelter Association of Washtenaw County
- SafeHouse Center
- U-M Sexual Assault Prevention and Awareness Center (SAPAC)
- Planned Parenthood Ann Arbor
- Crisis Text Line – National virtual volunteering.
- Community Action Network
- Disability, Genetic & Mental Health Advocacy Groups
- Genetic Disorder Advocacy Organizations (NHGRI) – Directory of national organizations; many offer remote or in-person volunteer opportunities.
- Children & Adults with ADHD (CHADD)
- National Alliance on Mental Illness (NAMI)
- Why This Experience Matters
- Genetic counseling programs highly value advocacy and support roles—showing comfort with sensitive conversations, diverse client populations, and emotional support.
Genetic Counseling Program Info & Professional Resources
- Graduate Programs
- List of Accredited Genetic Counseling Programs (AAGC/NSGC) – Locate programs nationwide and review requirements.
- Genetic Counseling Admissions Match (GC Admissions Match Service) – Application portal for most U.S. programs.
- Podcasts, Blogs & Online Communities
- National Society of Genetic Counselors
- AboutGeneticCounselors.org
- DNA Podcast – News, interviews, and recent discoveries in genetics and genetic counseling.
- A Caffeinated Genetic Counselor (blog)
- Research Opportunities for Aspiring Genetic Counselors
- U-M Undergraduate Summer Research Programs (May need to reload page upon opening)
Pre-Optometry
Shadowing, Observation, & Mentorship
-
Local Optometry Offices (contact directly for shadowing):
- Ann Arbor Optometry
- Clarkson Eyecare
- CVC Vision Center
- Kellogg Eye Center (U-M)
- Stadium Opticians
- Eye Care Directory
Tip: Email local optometrists, include your status as a pre-optometry student, and ask about observation or shadowing opportunities. Hospital-affiliated clinics (like Kellogg) may offer structured observation if you inquire in advance.
- National Resources
- ASCO Eye Opener Sessions – The Eye Opener Session program is a matching service for potential and future optometry students who are looking for a Doctor of Optometry to shadow, via in person or virtually, to learn more about a day-in-the-life of an optometrist (OD). Communication can also be done via chat and/or email. Students will be matched with an OD based on geographical information, common interests, and goals.
Summer Programs, Pipeline, and Clinical Experience
- Structured pre-optometry internships are rare, but these national programs and clinical roles offer deep exposure to vision care, optometry education, and hands-on patient experience.
- National & Pipeline Programs
- ASCO Optometry Program Directory – Summer & Pipeline Programs Filter – Use the advanced search tool to find summer/prep programs at optometry schools nationwide; watch for research/clinical postings.
- Collegiate Science & Technology Entry Program (CSTEP) – SUNY
- Focus on Your Future – Illinois College of Optometry
- I-DOC – Ohio State University
- Opto-Camp – UC Berkeley
- Clinical Experience, Scribe, and Gap Year Roles
Professional Associations & National Resources
- American Optometric Association (AOA) – National organization for the advancement of optometry education and careers. Offers application tips, advocacy, events, and career pathway resources.
- Eyes On Eyecare – News, career pathways, and resources for pre-optometry and optometry students.
- OptometryStudents.com – Peer articles, Q&As, and the latest national forums for aspiring optometrists.
Pre-Pharmacy
Shadowing, Clinical, & Pharmacy Experience
-
Local and Chain Pharmacies (Ann Arbor & Beyond):
- CVS Pharmacy (multiple locations: Industrial Hwy, S. Main St, S. State St, W. Stadium Blvd, W. Waters Rd)
- HealthPlus Pharmacy of Ann Arbor
- Kroger Pharmacy (S. Maple Rd, Plymouth Rd, Carpenter Rd)
- Meijer Pharmacy (Ann Arbor-Saline, Jackson Rd, Carpenter Rd)
- Trinity Health Michigan Pharmacy
- Walgreens Pharmacy (Jackson Ave, S. State St, Washtenaw Ave)
- VA Hospital Pharmacy
Tip: Contact local pharmacists directly to inquire about shadowing, assisting, or pharmacy technician roles. Most chain pharmacies offer formal training for technician or assistant positions, which is excellent patient/community experience for applications.
Summer Enrichment Programs & National Opportunities
- U-M & Michigan-Based Programs
- UM Pharmacy Scholars Program (PSP) – A six-week summer program for juniors, seniors, and recent graduates, covering the PCAT, interview prep, academics, and faculty networking.
- UM Profile for Success Pharmacy Program – A summer enrichment program focused on preparing for pharmacy school applications.
- National Summer & Pipeline Programs
- Advanced College Summer Enrichment Program – Howard University
- Engage Chicago – Northwestern University – Weekly seminars and applied field experiences, with a Health & Medicine track.
- ExRx: Experience Pharmacy Summer Boot Camp – Univ. of Charleston
- Pre-Pharmacy Enrichment Summer Program – KGI – Free, five-day residential summer program.
- Summer Academic Enrichment Program (SAEP) – Virginia Commonwealth Univ.
- Summer Health Professions Education Program (SHPEP) – National, free enrichment for undergrads in pre-health, including pharmacy.
- Summer Pharmacy Institute – UIC
- Summer Undergraduate Research Fellowship (SURF) Program – Rutgers
Professional Associations & Career Exploration
Pre-Physical Therapy / Occupational Therapy
Clinical & Shadowing Experience
-
Local PT/OT Practices (Ann Arbor & Southeast Michigan)
- ATI Physical Therapy
- Concentra Urgent Care
- Medsport U-M Sports Medicine
- Team Rehabilitation
- Adams Sports Medicine
- Michigan Medicine Volunteer Programs
Contact local offices and clinics directly to request shadowing or volunteer opportunities. Each PT or OT school will have different observation hour expectations—track both your direct patient and virtual/telehealth exposures where allowed.
- Volunteer in PT/OT Hospital Departments
- Briarwood Complex – MedRehab (U-M) (Outpatient)
- C.S. Mott Children's Hospital (Pediatrics, Inpatient/Rehab)
- U-M University Hospital Occupational Therapy (by approval)
Summer Programs, Internships & Gap Year Opportunities
- Summer & Pipeline Programs
- GoGlobal! – U-M Kinesiology – International study, internships, and research opportunities, including exercise science and rehabilitation/therapy options.
- STAR Physical Therapy College Student Internship Program – Clinical internships for current undergraduates interested in PT/OT.
- Health P.A.S.S. – Des Moines University – Health Professions Advanced Summer Scholars Program (includes PT/OT).
- Pre-Occupational Therapy Summer Program – KGI
- Summer Academic Enrichment Program (SAEP) – VCU – Six-week inter-professional academic enrichment for dentistry, medicine, pharmacy, and PT.
- Summer Health Professions Education Program (SHPEP) – National pipeline for underrepresented and disadvantaged students; some locations include PT/OT tracks.
- Gap Year & Physical Therapy Assistant Roles
- Glacier Hills – Assisted living with PT/OT needs.
- University of Michigan Health System – Search therapy aide, therapy assistant, and inpatient rehab positions.
- Note: Physical Therapy Assistant (PTA) jobs generally require completion of a two-year associate degree.
Professional Associations & Career Exploration
- American Physical Therapy Association (APTA) – Careers in Physical Therapy – Comprehensive overview of the PT profession.
- American Physical Therapy Association (APTA) – Find a PT Directory
- American Occupational Therapy Association (AOTA) – What is OT? – Learn about careers in occupational therapy.
- Physical Therapy Web – Career guides and school lists for PT and OT students.
Pre-Podiatry
Shadowing & Informational Interviews with Local Podiatrists
- Ann Arbor & Southeast Michigan Podiatrists (Contact Directly):
Tip: Most DPMs are open to student requests, especially if you are prompt, professional, and clear about your academic status and interest in observing a typical day.
- National Resources
- Step Into Podiatry - Find a Mentor – National directory for finding podiatrists open to student shadowing and mentoring.
- AACPM - Find a Mentor
Internships, Summer/Winter Programs & National Opportunities
- Pre-Podiatry Enrichment & Clinical Programs
- California School of Podiatric Medicine Summer Enrichment Workshop – Hands-on clinical days: casting, suturing, sports medicine, and more.
- Temple University School of Podiatric Medicine Internship Programs – Free winter and eight-day summer internships on-campus.
Professional Associations & Career Exploration
- ExploreHealthCareers.org – Career Profile: Podiatrist – Day-in-the-life summaries, job outlook, education paths, and key skills.
- American Association of Colleges of Podiatric Medicine (AACPM) – Application and school directory, career resources, and DPM FAQs.
- AACPM Application Service – Centralized portal for podiatric medical school applications.
- American Academy of Podiatric Sports Medicine
- American Podiatric Medical Association (APMA) – Info about specialties, career paths, and national advocacy for DPMs.
- ePodiatry – International directory and resource site for podiatry topics.
- Podiatry Residency Resource
Pre-Public Health
Public Health Experience & Internships
- Public Health Experience in Washtenaw County & Michigan
- Health Department Washtenaw County – Local internships, jobs, and volunteer roles in public health.
- ALTARUM – Public Health Innovation Jobs/Internships
- Michigan Community Health Worker Alliance
- National Websites for Jobs and Internships
Tip: Many public health summer programs and internships are open to all majors—experience in policy, communication, epidemiology, or social work can be valuable, too.
Summer Institutes, Pipelines, & Enrichment Programs
- University of Michigan Future Public Health Leaders Program (UM FPHLP) – Summer enrichment, leadership, and exposure for undergraduates.
- Boston University Summer Institute for Training in Biostatistics
- Big Data Summer Institute – University of Michigan
- CDC Public Health Associates Program (PHAP)
- Colorado School of Public Health: CoSIBS Summer Institute
- Columbia University Summer Public Health Scholars Program (SPHSP)
- Iowa Summer Institute in Biostatistics
- Johns Hopkins Diversity Summer Internship Program (DSIP)
- Kennedy Krieger Institute James A. Ferguson Emerging Infectious Diseases Fellowship Program
- Kennedy Krieger Institute MCHC/RISE-UP
- Morehouse College – Project IMHOTEP
- UCLA Public Health Scholars Training Program
- LA’s Biostatistics Education Summer Training program at USC
- Vanderbilt University Medical Center – Program for LGBTQ Health
- Washington University Institute for Public Health Summer Research Program
Tip: Many public health summer programs and internships are open to all majors—experience in policy, communication, epidemiology, or social work can be valuable, too.
Pre-Veterinary
Shadowing, Clinical, & Animal Experience
- Local Animal Experience & Volunteering
- Local Veterinary Clinics & Hospitals
Summer Programs & Domestic Internships
- Veterinary Summer & Enrichment Programs
- Adventures in Veterinary Medicine @ Tufts – Hands-on exposure and veterinary career exploration at Cummings School of Veterinary Medicine.
- Enrichment Summer Program @ MSU – Michigan State’s College of Veterinary Medicine pipeline program.
- Veterinary Scholars Summer Research Program @ Purdue – Research fellowships for undergrads exploring veterinary medicine.
- Duke Pre-Veterinary Society – Summer Opportunities Compilation
- Domestic Veterinary Internships
- ECMO Lab (U-M) – Opportunities for student involvement in animal physiology and biomedical engineering studies.
- Seneca Park Zoo Pre-Vet Internship – Exotic animal medicine, research, and hands-on experience with zoo animals.
- Select Sires Veterinarian Internship – Focus on food animal medicine and herd health.
- Staten Island Zoo Internship Program
- Other Internship Opportunities (Animal, Wildlife & Specialty)
Research & International/Abroad Opportunities
- Research Experiences with Animals
- Cheetah Experience (South Africa) – Hands-on research and animal care for a variety of species.
- Harnas Wildlife Foundation (Namibia) – Volunteering, rehabilitation, and conservation research.
- International Student Volunteers Wildlife Conservation Programs – Animal care and field research in locations such as Costa Rica, Thailand, and South Africa.
- Veterinary & Animal Care Abroad
- Projects Abroad: Veterinary Medicine & Animal Care – Clinical and research-based placements with veterinarians internationally.
- Vets in the Wild (South Africa) – Focuses on wildlife rehab, diseases, sustainable resources, and field medicine.
Professional Associations & Career Exploration
- Animal Welfare Information Center – Information and resources on animal care, welfare, and research.
- AVMA Career Center – American Veterinary Medical Association job board and career resources.
- FDA Center for Veterinary Medicine
- USDA Center for Veterinary Biologics