Overweight Dog Diet
Why Dogs Gain Weight After Spaying or Neutering
Hormonal changes and a slower metabolism are common causes.
1 min readReviewed: Sep 20, 2025
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Why Dogs Gain Weight After Spaying or Neutering
What Happens?
- Sex hormone levels decrease
- Metabolism can slow by 10-20%
- Satiety (feeling full) changes
- Increased appetite
What You Can Do
- Reduce portion size by 10-15%
- If weight gain is observed after 3-4 months, reduce further
- Switch to food formulated for spayed/neutered dogs
Important
Don't wait until your dog is visibly overweight.
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How much food does your dog need per day?
Enter weight and activity level — 10 seconds and you get the daily portion.
References
- 1.Jeusette I, Detilleux J, Cuvelier C, Istasse L, Diez M — Ad libitum feeding following ovariectomy in female Beagle dogs: effect on maintenance energy requirement and on blood metabolites. Journal of Animal Physiology and Animal Nutrition 88(3–4):117–121, 2004. https://doi.org/10.1111/j.1439-0396.2003.00467.x (accessed: 2026-09-10)
- 2.Lefebvre SL, Yang M, Wang M, Elliott DA, Buff PR, Lund EM — Effect of age at gonadectomy on the probability of dogs becoming overweight. Journal of the American Veterinary Medical Association 243(2):236–243, 2013. https://doi.org/10.2460/javma.243.2.236 (accessed: 2026-09-10)
- 3.Cline MG, Burns KM, Coe JB, et al. — 2021 AAHA Nutrition and Weight Management Guidelines for Dogs and Cats. Journal of the American Animal Hospital Association 57(4):153–178, 2021. https://doi.org/10.5326/JAAHA-MS-7232 (accessed: 2026-09-10)
- 4.German AJ — The growing problem of obesity in dogs and cats. The Journal of Nutrition 136(7):1940S–1946S, 2006. https://doi.org/10.1093/jn/136.7.1940S (accessed: 2026-09-10)
- 5.Laflamme DP — Development and validation of a body condition score system for dogs. Canine Practice 22(4):10–15, 1997. (accessed: 2026-09-10)
This is general information and does not replace a veterinary diagnosis.
This guide was compiled based on the expert input of Reka Fazekas-Birizdo canine nutritionist.
Certified Canine Nutritionist
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