Here's why:
* Growth is primarily controlled by hormones: While spaying does remove the ovaries and stop the production of estrogen, growth is primarily controlled by growth hormone, which is produced in the pituitary gland.
* Spaying can affect growth plate closure: Spaying can slightly delay the closure of growth plates in some dogs, which might lead to a slightly larger final size. However, this is not a guaranteed outcome, and the difference is usually very small.
* The impact varies depending on the breed: Certain breeds are more prone to experiencing delayed growth plate closure after spaying than others.
Overall, spaying does not significantly affect a dog's final size. It might slightly delay growth in some cases, but the effect is usually negligible.
If you have concerns about your dog's growth, it's best to consult with your veterinarian for personalized advice.