Sibling Dog Fighting/Aggression

Question
Hello, my name is Jack, 18, and take residence in California. In my house, I have 6 dogs (1 Heinz 57 "Winston", 1 50/50 Lab/Border Collie "Kacy", 1 McNab Border Collie "Ginger", and 3 of their children "Pearl","Rosco","Jake". My dilemma is this; Originally, we've had only 5 dogs, but since a friend is having housing problems, he can't keep Jake (which he bought from the original litter the McNab had)and needs us to hold him for about a month. Now, the other dogs (Mainly Kacy and Rosco) have major aggression towards this pup, even though they're related. And it isn't just play-fighting either. Their hair will frill up on their backs and growl very menacingly. I'm sorry if this isn't quite your area of support, but I really need some help. ;.;

Answer
Jack, dogs have no concept of family, once they are weaned and go their separate ways. This is evident by the fact that mothers will breed to their own sons and fathers to their own daughters.

The first thing I have to do is say shame on you for letting your dogs breed and have mixed-breed puppies. You should, at the very least, have Ginger spayed. If she's a show dog, or whatever, and must remain intact, then you should have your two mixed-breed boys neutered.

Now, on to the problem at hand. Is there any specific reason why your dogs must get along with Jake, if he's only going to be there for a month? Can you not just keep him separated from your dogs during that time? It's really no different than keeping your boys away from Ginger when she's on heat.

If that is simply not an option, then my suggestion would be to take them for walks with Jake, one at a time. Do not allow any kind of aggression from either dog during these walks. What if you let Jake out with just one dog at a time, at your house? Do they still want to fight with him, or is it only when they are all together?


Honestly, without seeing them in person, I'm hesitant to give you advice, because I cannot see their body language and accurately gauge what is going on. My best advice to you would be to consult with a local trainer who has experience dealing with dog to dog aggression, and who can come to your house and work with you and the dogs one-on-one.