i have a 6 month old male Rottweiler and just got a 12 week old male Rottweiler, my 6 month old has never showed any signs of aggression has never barked at other dogs or people or growled or anything like that.. I don’t know when this 12 week old puppy was taken from its mother maybe it was taken away too soon. When they play together sometimes the puppy gets a little too bitey but my other Rottweiler doesn’t correct him or anything cause he thinks he is still just playing I think. Sometimes when the 12 week old is laying down and you go to kiss his face or something he growls and snaps at your face and when we first brought him home he would squirm if picked up but he doesn’t do that anymore, and now he rolls over on his back, before he wouldn’t. Is this an aggressive dog or does he just need more training? And if the playing gets too rough is there anything I could do to get them to both stop? I’ve heard shaking a can with coins in it works but if it’s just the puppy being too bitey I don’t want to scare or correct my 6 month old if he’s not doing anything wrong. It has only been 4 days so maybe when the puppy isn’t so new things will calm down? Any advice will help! Thank you!!