When does a Sheltie stop "growing"? I took my dog to doggie camp at Petsmart today and there was another lil' Sheltie there! I wound up talking to them for a bit and they said their little girl was 8 months old (and had a very bushy coat) and I said that Pogo was about 5 1/2 months old. I swear they were the same size. I sorta felt bad for my lil' guy because you can tell a difference between a dog from a good breeder and one from a BYB (at least in this case). But I love him regardless! BTW, if I hear one more person call my dog a "mini Collie" I think I'm going to have to hurt them.