Does anyone know at what age a cat is considered to be at its full adult size?
Originally Posted by valanhb
Generally speaking, 1 year is the accepted age that they stop growing and are considered "adults".
However, there are breeds that continue to grow until they are 2+ years. The larger breeds, like Maine Coon and Ragdoll, are examples of this. I also believe that Siamese generally develop slower than other breeds (which is why a good breeder absolutely will not let a Meezer go before 12-16 weeks old), and they shouldn't be bred until later than is generally accepted for other breeds.
So, if there are other breeds in a moggy, they could continue to grow past one year, but that is the accepted age of adulthood for moggies and most breeds.