This is sort of a guess, but I believe the average weight for a TAG is like 280-400ish. Dozy is full grown by now (at least I was told that Ollie was full grown when she was just 6 months).
Ollie will be 3 in May. When Ollie about 6 months old I was told she was full grown. TAGs grow faster than CAGs so I would assume Dozy is done growing. Obviously she could always gain weight...make sure she never gets too pudgy!