I think it depends on the dog. I've had dobermans that were "civilized" by the time they were a year old. I've had others that were a handful their entire lives...give them an inch, they'd take a mile every time. For the most part, speaking very generally, I'd say the puppy craziness is a thing of the past by the time a dog is 2 years old or so.TheManInBlack said:
There are a variety of ways to define intelligence. Most of the "lists" you see ranking canine intelligence are based on how many repetitions it takes to teach a dog a new behavior. That's just one aspect of intelligence, tho-things like problem solving behavior also come into it.