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Why is my Boston Terrier losing weight — Local Help in Phoenix

Unexplained weight loss — despite normal or increased appetite — is a red flag for metabolic disease, cancer, parasites, or malabsorption. Weigh weekly for baseline.

Local resources for Phoenix pet owners

Common causes of weight loss in Boston Terriers

  • Hyperthyroidism (common in older cats)
  • Diabetes mellitus
  • Intestinal parasites or malabsorption
  • Dental disease causing pain when eating
  • Cancer or organ disease

When it's an emergency

Take your Boston Terrier to a vet immediately if any of the following apply:

  • Losing more than 10% of body weight in a month
  • Weight loss with vomiting, diarrhea, or lethargy
  • Visible muscle wasting along spine or hips

Safe home care steps

  • Weigh weekly and record trend
  • Check food quality — switch to a higher-calorie, complete diet
  • Deworm if not recently done

Important: Home care is supportive only. If symptoms persist beyond 24–48 hours, consult a licensed veterinarian — AI guidance is not a substitute for professional diagnosis.

Find a vet in Phoenix

Search our directory of veterinary clinics in Phoenix — filter by services, ratings, and emergency availability.

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Get a personalized assessment

Use our free AI symptom checker for guidance tailored to your Boston Terrier's age, weight, and history.

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Frequently Asked Questions

Unexplained weight loss — despite normal or increased appetite — is a red flag for metabolic disease, cancer, parasites, or malabsorption. Weigh weekly for baseline.