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Endocrine · Cats & dogs

Weight, nutrition and body condition: track the trend with repeatable measures

Interpret weight with food, water, urine, stool and activity. A body-condition score describes appearance but does not replace an exam or justify an unsupervised weight-loss plan.

Editorial update: 2026-10-19 · Version 2026.10.19.2
Veterinary review: pending

Weight, nutrition and body condition: track the trend with repeatable measures

Educational pet-health and visit-preparation reference. Not a diagnosis, prescription, dosage recommendation or substitute for a veterinarian. Veterinary review: pending. This is an editorial educational reference. Checking sources is not a veterinary assessment of your pet.

Weigh under consistent conditions and record actual intake

Use the same scale, similar time and method when possible. Record grams of main food, treats, prescription diets, leftovers and appetite changes. A long coat, abdominal distension or dehydration can alter appearance, so do not rely on “looks fat.”

Section sources: WSAVA Global Guidelines · AAHA Clinical Practice Guidelines

Cross-check the weight trend with water, urine and stool

Record dates and frequency when weight loss comes with increased hunger or drinking and urination, gain comes with less activity, or weight change comes with vomiting, diarrhea or constipation. Cats may first eat less, hide or stop jumping; dogs may first tolerate less activity.

Section sources: AAHA Clinical Practice Guidelines · VCA Know Your Pet

Rapid change or systemic illness needs prompt assessment

Promptly contact a clinic for marked short-term loss, complete food refusal, repeated vomiting, severe diarrhea, collapse, breathing trouble or profound weakness. Use a lower threshold for young, senior, pregnant, chronically ill or medicated pets.

Section sources: Merck Veterinary Manual: When to see a veterinarian

Build a feeding plan with someone who knows the medical history

Bring the weight trend, food labels, daily total, treats and activity. For weight loss or a diet change, ask a veterinarian to account for age, breed, neuter status, disease and medicines. Do not use fasting, extreme restriction or unverified supplements as a shortcut.

Section sources: AAHA: Preparing for a successful veterinary visit · WSAVA Global Guidelines

Use this guide to prepare for a visit

Weight and nutrition record Date/weight: Main food and treats: Appetite/leftovers: Water, urine, stool: Activity/body-condition photos: Disease/medicines: Clinic goal:

Record observations for this topic Visit checklist

Sources & editorial context

What changed

根据症状模式、风险边界、观察记录和就诊交接重写,待专业医学复核。

Dates identify editorial updates and source checks, not clinical approval. All four languages were edited together; native-language and veterinary review remain pending.

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