Jacks can be same sex aggressive and if you are occasionally just putting your jack out into these other dog's territory, you are just asking for trouble. If it is such a problem, don't do it. Try walking one of the dogs with your dog at a time. Let them get to know each other. But just putting your dog outside in their territory and be outnumbered you are asking for problems.
Feb 19, 2008 Rating
problems with fighting by: Mila Dorotea
It seems that he is not socialized.
Dogs are pack animals and he does not belong to that pack. Start with having them see each other daily at a distance with a barrier between them. I know a Lab that was not socialized and would growl at all dogs. I had the owner, with the dog on a leash, daily, visit the dogs at a 30 foot distance. Over 3 months, gradually decrease the distance as the dog tolerates. Now, the Lab plays off the leash, with our dogs. She is now part of the pack
