Join Date: Apr 2014
Location: Ontario, Canada
It's because she was spayed so young. Removing the hormones delays the closing of the growth plates of the bones, causing the dog to grow taller than it normally would.
Next time, do NOT spay until the dog is finished growing, which is usually around 1 year of age! Waiting until after the first heat is a good idea, because at that point you know the hormones have done what they are supposed to do.
Some recommend waiting until 2 years of age, which is when final OFA hip x-rays can be done for dysplasia