Could it be that we are keeping all pets in their baby/infant state, psychologically? Hypothetically, if talking apes were capturing human babies and keeping them as pets (as in Planet of Apes) like we keep cats as pets, the apes would neuter/spay the human children, feed them corn & applesauce thrice a day, squirt water on them if they sat on the dinner table, etc., for the rest of their lives. Wouldn't that cause the human to become overly depressive, but also (my current hypothesis ---> ) stuck in infancy for the entirety of their lives? As evidence, I'd like to point to the fact that cats that are born as pets never really learn the adult meow, they stick with the baby "meew," because that gets them what they want. So, why would they ever change?