I have recently got an 8 week old Samoyed and we already have 2 dogs in the house. A male Border Collie and a female Golden Retriever, both 1 year old. Within 10 minutes of bringing the new puppy in to the house the golden retriever was growling at him and had pinned him down and tried to bite him, I pulled her away but kept trying to get at him. She is normally good with other dogs, inside and out of the house. For the last month or so she has been quite snappy with the cats which she normally did not bother with. I am intergrating the puppy to her slowly with supervised play times but she still has not taken to him. The Border Collie gets on really well with the puppy and she will sit and watch them play together and seems to want to join in herself i'm just worried if we let her go she may hurt him. I know it is not uncommom for dogs to take a dislike to new puppies but was not sure of the level of aggression she would show towards him. When the puppy has had all of his injections I will take them all out together and hopefully on neutral ground they will get on better. Has anyone else had this kind of problem or would know the best way of dealing with it?