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Updated on September 23rd, 2025
Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | neutered | 4 years and 6 months old | 21 lbs
adopted a shih tsu in July. he was 15 lbs. Now he is 21 lbs. Is there any medical treatment or food to help him lose weight? He is 4 yrs old and neutered.
2 Answers

Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on February 7th, 2017
Answered By Destini R. Holloway, DVM
Veterinarian
Most neutered pets are at a higher risk for putting on weight because of a decrease in hormone levels which can decrease your pets activity level. 6 lbs is a lot to gain in a small breed dog. First I would recommend getting Henry's thyroid levels testednto make sure his levels aren't low. That would definitely make it very difficult for his to maintain an appropriate weight without medications to level his thyroid hormones.
If his thyroid levels are normal, then I would recommend asking your vet for a prescription for a weight loss food such as Hills Metabolic (highly recommended) or Royal Canin low calorie. There are tons of non-prescription brands however the prescription diets are more effective and reliable. Best luck with Henry and his weight loss.
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