Helping pets live healthier lives.

Resources to help you understand body condition, start better conversations, and take the next step together.

Start with body condition Veterinary resources

Pet obesity is a clinical health condition.
Awareness is the first step.

Since 2005, the Association for Pet Obesity Prevention has provided veterinary healthcare professionals and pet owners evidence-based tools, prevalence data, and resources to support diagnosis, communication, and treatment of clinical pet obesity.

Start here

Find the right APOP resource

Choose the path that best matches what you need today.

Pet owners

Is my pet at a healthy body condition?

Check body condition, review calories and feeding, and find safer weight-management guidance.

Start with body condition Veterinary teams

I need clinical tools

Open BCS and MCS charts, clinical calculators, client materials, and communication resources.

View clinical resources Research & data

I need survey information

Review prevalence methodology, annual findings, historical results, and clinic participation information.

Explore research and data

Popular tools

Practical resources, all in one place

Start with body condition, then use the tools that fit your pet, patient, or clinical question.

Assessment

Body and muscle condition

View dog, cat, rabbit, and horse BCS charts, plus the dog and cat Muscle Condition Score chart.

View BCS & MCS charts

Calculators

Dog and cat calorie tools

Estimate daily needs, review current intake, check treats, and translate calorie targets into measured feeding amounts.

Choose a calculator

Guides

Weight-loss guidance

Practical dog and cat guidance covering measured feeding, activity, monitoring, rechecks, and veterinary follow-up.

Dog guide Cat guide

Clinical

Veterinary team resources

Clinical calculators, BCS and MCS resources, client handouts, and communication support for weight-management care.

Open veterinary tools

Also useful Dog and cat breed weight ranges

Research & prevalence

Evidence behind the tools

Review current findings, survey methods, and APOP’s historical pet obesity data.

Latest findings

2025 Pet Obesity & Nutrition Opinion Survey

Review self-reported findings on body condition, feeding practices, weight-management efforts, and veterinary communication.

Read the 2025 findings

Methods & results

APOP surveys and data

See how clinic-based prevalence surveys and opinion surveys are designed, analyzed, and interpreted, then browse results by year.

Explore surveys and data

National reference

State of Pet Obesity report

Review APOP’s U.S. report on dog and cat obesity prevalence, owner perception, feeding behavior, and clinical trends.

View the report

Clinic survey registration

2026 Clinic Prevalence Survey

Choose one clinic day or week and record species, weight, 1–9 Body Condition Score, and owner perception for eligible dogs and cats.

October 2026
Dogs and cats
One day or week

About APOP

Advancing healthier body condition since 2005

APOP is a nonprofit organization supporting pet owners and veterinary teams through prevalence research, body condition assessment tools, practical education, and evidence-based guidance for obesity care.

Learn about APOP

Since 2005

A focused mission

APOP works to improve how excess body fat and obesity-related health risks are recognized, discussed, prevented, and treated.

Prevalence research

Measuring what matters

Clinic-based surveys and owner opinion studies help reveal body condition trends, perception gaps, and opportunities to improve care.

Clinical tools

Assessment made practical

BCS and MCS charts, calculators, guides, and client resources support consistent assessment and individualized care.

Collaboration

Clearer standards

APOP works with veterinary and animal-health partners to strengthen definitions, communication, and obesity care.

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