Instructions
Make a vet appointment for both dogs. Fighting and aggression can sometimes be caused by medical issues.
Let the dogs around each other in a neutral territory, such as a dog park. Keep them on leashes initially, and don't let them near enough to touch.
Give the dogs treats when they are not displaying signs of aggression, such as growling, and when they are not barking. Praise them for this good behavior.
Move the dogs a little closer once they are calm for a period of time. This could take several trips to the dog park over a period of weeks. Again, give the dogs treats and praise when they act accordingly. You want them to associate each other's presence with positive things.
Take the dogs on a walk together once they can be close to each other without fighting. Reinforce the desired behaviors with praise and treats.
Walk the dogs closer and closer to your home and your daughter's home. Always start the walk at a neutral location. Let this process take a few weeks and several walks. Eventually, with positive reinforcement, you should be able to walk by each of your homes and even take the dogs inside without any fighting.
How Do I Socialize My Dog With My Daughter's Dogs When All They Do Is Fight?
If your dog does not get along well with other dogs, you might need to address the issue. Any signs of aggression should be taken seriously. But if your dog just doesn't prefer the company of other dogs, you can in some cases limit interactions to avoid potential problems. However, if a family member such as your daughter also has a dog and the two are going to be around each other, there are training techniques you can use to socialize your dog and teach the two to get along or at least tolerate each other without fighting.