Zoology and animal science both involve the study of animals. Beyond that, they diverge sharply. Zoology studies animals in natural systems — wild populations, ecosystems, evolutionary relationships. Animal science studies animals under human management — livestock, companion animals, captive wildlife, laboratory animals.
The distinction matters because it determines your curriculum, your career options, your salary range, and where you spend your workday. A zoologist might spend weeks radio-tracking wolves in Montana. An animal scientist might spend the same weeks optimizing feed conversion ratios for a 10,000-head cattle operation in Kansas. Both are legitimate, important work. They are not the same work.
This article compares the two fields head-on: what you study, where you work, what you earn, and how you decide between them.
Curriculum Differences
Zoology Core Courses
- General zoology
- Invertebrate zoology
- Vertebrate zoology
- Ecology
- Evolution
- Genetics (population genetics emphasis)
- Cell and molecular biology
- Biostatistics
- Conservation biology
- Field methods / field ecology
- Taxonomy and systematics
Zoology curricula emphasize wild animal biology, evolution, and ecology. The focus is on understanding animals within their evolutionary and ecological context. Fieldwork is a significant component — many zoology programs include field courses at biological research stations.
Animal Science Core Courses
- Introduction to animal science
- Animal nutrition
- Animal reproduction
- Animal genetics (breeding and selection emphasis)
- Livestock management
- Meat science
- Animal health and disease
- Animal behavior and welfare
- Physiology of domestic animals
- Agricultural economics
Animal science curricula emphasize applied knowledge: how to feed, breed, manage, and improve domestic animals. The orientation is practical. Students handle livestock, evaluate animal performance, formulate rations, and learn industry-relevant skills. Many programs are housed in colleges of agriculture at land-grant universities.
Overlap Areas
Both majors share foundational coursework in biology, chemistry, anatomy, physiology, and genetics. Both require statistics. Both develop scientific reasoning skills. A student with a BS in zoology can apply to the same graduate programs as a student with a BS in animal science, provided they have the right prerequisite courses.
The overlap is large enough that switching between the two at the graduate level is common. A zoology undergrad who develops an interest in companion animal behavior can pursue an MS in animal behavior. An animal science undergrad who wants to study wild populations can apply to ecology PhD programs.
Career Paths: Zoology
Wildlife Biologist
The flagship zoology career. Wildlife biologists study wild animal populations, their habitats, and their conservation status. Employers include state fish and wildlife agencies, the U.S. Fish and Wildlife Service, the National Park Service, and environmental consulting firms. Median salary: $63,210 (BLS, 2025). Entry-level federal positions start at GS-5 to GS-7 ($35,000 to $48,000). Senior research biologists reach GS-12 to GS-14 ($78,000 to $130,000).
Conservation Scientist
Conservation scientists manage natural resources — forests, rangelands, water resources — and the animal populations that depend on them. Often employed by federal agencies (USDA Forest Service, BLM) and state agencies. Median salary: $64,010. Job growth: 5% through 2032.
Marine Biologist
Marine biology is a subspecialization of zoology focused on ocean organisms. Research roles at NOAA, university marine labs, and aquariums. Median salary ranges from $48,000 for entry-level positions to $85,000+ for senior researchers. Positions are scarce relative to applicant numbers.
Environmental Consultant
Private consulting firms hire zoologists to conduct environmental impact assessments, endangered species surveys, and habitat evaluations for construction and development projects. Salary: $50,000 to $80,000. This is one of the more accessible zoology career paths — demand is driven by regulatory requirements.
Museum / Academic Curator
Natural history museums employ zoologists as collection curators and researchers. Requires a PhD for tenure-track museum positions. Salary: $55,000 to $90,000 at major institutions. Very competitive — major museums hire curators once every few years per department.
Career Paths: Animal Science
Livestock Production Manager
Managing cattle, poultry, swine, or dairy operations. Responsibilities include nutrition programs, breeding decisions, herd health, facility management, and production recordkeeping. Salary: $55,000 to $95,000 depending on operation size and species. Corporate operations (Tyson, Cargill, Smithfield) pay the top end.
Veterinary-Adjacent Roles
Animal science graduates fill roles that support veterinary medicine without a DVM: veterinary technology (with additional credentialing), pharmaceutical sales, laboratory animal management, and veterinary practice management. Salary: $35,000 to $85,000 depending on role.
Animal Behaviorist / Trainer
Applied animal behavior work with companion animals, shelter populations, or zoo animals. Entry-level with a BS; advancement requires an MS or PhD and professional certification. BS-level salary: $30,000 to $40,000. MS/PhD with certification: $55,000 to $92,000.
Animal Nutrition Specialist
Formulating animal feeds and diets for livestock, companion animals, or zoo animals. Industry positions at feed companies (Purina, Hill’s, Royal Canin) or independent consulting. Salary: $50,000 to $90,000 at the BS/MS level. PhD nutritionists and ACVN diplomates earn $90,000 to $150,000+. See our pet nutrition certification guide for credential details.
Shelter and Rescue Management
Running animal shelters and rescue organizations. Combines animal science knowledge with nonprofit management. Salary: $45,000 to $120,000 depending on organization size. Our shelter management career guide covers this path in detail.
Agricultural Extension Agent
University extension services employ animal scientists to advise farmers and ranchers on best practices in animal management, nutrition, and health. Positions through the Cooperative Extension System at land-grant universities. Salary: $45,000 to $70,000 with state benefits.
Salary Comparison
| Role | Field | Median Salary | Range |
|---|---|---|---|
| Wildlife biologist | Zoology | $63,210 | $42,000 – $100,000 |
| Environmental consultant | Zoology | $65,000 | $50,000 – $80,000 |
| Conservation scientist | Zoology | $64,010 | $42,000 – $95,000 |
| Livestock production manager | Animal Science | $75,000 | $55,000 – $95,000 |
| Animal scientist (research) | Animal Science | $72,130 | $48,000 – $130,000 |
| Animal nutritionist (industry) | Animal Science | $70,000 | $50,000 – $150,000 |
| Dog trainer (certified) | Animal Science | $50,000 | $35,000 – $120,000+ |
| Zookeeper | Both | $33,430 | $26,000 – $45,000 |
On average, animal science careers pay somewhat more than zoology careers, largely because the livestock and pet industries have more revenue than wildlife conservation. The exceptions are at the top: senior wildlife researchers and conservation program directors at well-funded organizations earn competitive salaries.
Job Growth Projections
BLS projections through 2032:
- Zoologists and wildlife biologists: 5% growth (about average). Approximately 1,600 new positions nationally over 10 years. Competition is stiff because the supply of graduates consistently exceeds demand.
- Animal scientists: 6% growth (slightly above average). Roughly 2,000 new positions over 10 years. Demand concentrated in livestock states and the pet industry.
- Veterinary technicians: 20% growth (much faster than average). Animal science graduates who add vet tech credentials tap into this high-demand market.
The hidden factor: neither field has explosive growth in traditional roles. The real opportunities are in adjacent and hybrid roles — data science applied to wildlife tracking, precision livestock farming, animal welfare policy, and pet technology. Students who combine animal expertise with digital or business skills have the strongest job prospects.
Which Degree Should You Choose?
Choose zoology if:
- You are passionate about wild animals and natural ecosystems
- You want to do field research or work outdoors
- You are interested in evolution, ecology, and conservation
- You are comfortable with seasonal or grant-funded employment (common in wildlife biology early career)
- You plan to pursue a PhD and academic or government research career
Choose animal science if:
- You are interested in domestic animals — pets, livestock, horses
- You want more immediate career options after a bachelor’s degree
- You are interested in nutrition, behavior, reproduction, or production management
- You want a pre-vet pathway that includes broad animal management knowledge
- You prefer applied work over pure research
Not sure? If you are genuinely torn, animal science offers more flexibility. An animal science graduate can pivot into wildlife work through graduate school. A zoology graduate who discovers they prefer domestic animals can also pivot, but may lack practical animal management skills that animal science students develop. For online degree options in animal science, see our best programs guide.
Double Majors and Minors
At universities that offer both, a double major in zoology and animal science is possible but heavy — expect 5 years for a BS with both majors. A more practical approach: major in one, minor in the other. An animal science major with a zoology minor (or vice versa) gives you breadth without an extra year of tuition.
Alternatively, supplement either major with relevant minors:
- Business minor (for management or entrepreneurial careers)
- Data science or statistics minor (for research or industry analytics)
- Communications or journalism minor (for science communication, extension work)
- Environmental science minor (for conservation and policy roles)
Frequently Asked Questions
Can I go to vet school with either degree?
Yes. Veterinary schools do not require a specific major. They require specific prerequisite courses (biology, chemistry, organic chemistry, biochemistry, physics, statistics, and sometimes genetics). Both zoology and animal science programs include most of these prerequisites. Check your target vet school’s requirements early and fill gaps with electives.
Which degree has better job prospects?
Animal science has more entry-level job options directly after a bachelor’s degree. The livestock industry, pet industry, and veterinary support roles absorb more graduates than wildlife and conservation agencies do. Zoology has strong prospects for students willing to pursue graduate degrees and accept seasonal or contract work early in their careers. At the PhD level, both fields are equally competitive.
Is zoology harder than animal science?
They are difficult in different ways. Zoology tends toward heavier biology and ecology coursework. Animal science includes more chemistry (especially for pre-vet tracks) and applied management courses. Neither is objectively harder. GPA outcomes are similar across both majors at universities that offer both.
Can I switch from zoology to animal science in graduate school?
Yes. Graduate programs evaluate applicants based on research experience, prerequisite coursework, and potential fit with faculty research — not on undergraduate major title. A zoology graduate with relevant animal science courses and strong research experience is a competitive applicant for animal science MS and PhD programs. The reverse is equally true.
Do employers care which degree I have?
For entry-level positions, employers care more about skills, experience, and certifications than degree titles. A zoology graduate with dog training certification is hired the same as an animal science graduate with the same credential. For specialized roles (livestock nutritionist, wildlife biologist), the relevant degree is expected. For most positions, practical experience and professional credentials outweigh the specific major.
