At what milestone should a Corgi puppy switch to an adult maintenance formula?

When the puppy has reached about 90% of their expected adult weight.

Corgi puppies go through a rapid skeletal development phase, requiring specialized growth formulas rich in calories, protein, and specific minerals like calcium and phosphorus. However, feeding these highly energy-dense formulas for too long, or using large-breed growth food, can ironically increase the risk of orthopedic issues later by promoting overly rapid weight gain, even in short-legged breeds. Therefore, the transition point is tied to size attainment rather than strict age. The prudent time to shift to an adult maintenance diet is when the puppy has achieved approximately 90% of its anticipated final adult weight, which commonly occurs between nine and twelve months of age.