My AB is 8 months old. When I noticed how quickly he learned the SIT and LIE DOWN command I decided to sign him up for training class at PETSMART. Although is is a puppy (a calm puppy), he is an extremely fast learner. I reccomend teaching him basic commands like sit and lie down to see how quickly he learns at home.
My ab was approx 1 year old & was very easy to train with the underground fence.