Usually their adult teeth r in by6 mo, but there's still a lot of growing to do, thats probably the reason people don't let em lock on until they r more mature, and having the teeth set like u said. I had a pit pup do the same thing at like the same age, 2 baby canine teeth got ripped out cuz she got in the pen n caught the hog, the adult ones came in no problem. So thats my two cents