I recently adopted what I thought was a yellow Lab from a private owner. He is a nuetered 1 1/2 year old. I took him to the vet the next day because the previous owners had no documentation on his prior vaccinations/health. He is now Utd on all of his shots, heartworm medicine and flea medicine. The vet said he definitley has some bull terrier in him...probably pit bull, but listed him as a lab mix so we don't have to deal with the stigma. Marley seems very well socialized, knows basic commands, is very very affectionate and has assimilated quickly into our family. I plan to take him to obedience class which starts in two weeks. Not knowing I adopted a bull of some sort, and having always been a bit freaked out by those breeds, I am just wondering if I am on the right track and if there is anything else I can do to ensure the best life for my dog and my family.......He shows no signs of aggression other than a bit of growling at the cats when they get near his food bowls and a bit of growling when a new person walks in until we cheerfully tell him it's ok and then his tail starts wagging. Any helpful comments are much apperciated.