My male dogs fight over a female. How do I stop them from fighting?

At this stage you are not likely to correct this behavior. It is not uncommon for two female dogs that are not spayed to fight. You can have one or both of them spayed - that might help but there is no guarantee. The best thing to do is keep them separated at all times. If they have to be in the same room together then I suggest you keep basket muzzles on them so they can't hurt each other. ( https://www.amazon.com/Baskerville-Ultra-Basket-Dog-Muzzle/dp/B0051H45GC )

All you can do is keep them separated - best to take one of them to another location (a family or fiend's house). I suggest you have them spayed/neutered (or at least one of them) or this will be an ongoing problem.

Hormonal changes that occur after being spayed or neutered can sometimes cause tensions. Keeping the dogs separated unless supervised may help reduce fights. If you notice one or both dogs becoming too excited or agitated, separating them and giving them a chance to cool off can help. Removing items of contention such as treats or toys can also help reduce fighting. If the fighting continues, or they are unable to be together at all, seeking out a local veterinary behaviorist or trainer in person that can observe their behavior may be useful for formulating a training plan to help both dogs get along again.

When you have two bitches together, they will show aggression to compete for territory and intact males especially if they are in heat. The best thing to do is to have both of them spayed. This will reduce the aggression between them as it is most likely hormonally related. It will also eliminate the risk of a pyometra, which is a life threatening infection of the uterus. Without spaying them, you will have a very hard time reducing the aggression because it's hormonally related. Removing the source of the hormones is the best way to stop the aggression.

Oh dear! I'm sorry to hear that you're having this problem. Aggression between dogs in the same household is a complex behavioral problem that's difficult to address in a forum like this. If you want to keep both dogs, I would strongly suggest getting in touch with a veterinary behaviorist who can evaluate them in person and help you determine why the fights are happening. He/she can put together a detailed training plan to work on the problem, and may also recommend medication for one or both dogs as part of the overall treatment plan. In the meantime, since it sounds like these fights are quite serious, I would recommend keeping the dogs separated from each other to prevent further problems until you are able to get some professional help. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org

Im sorry you are having to deal with this. It sounds like Dog A has become very territorial or just aggressive. If he is still intact then this could be the cause and i would have him neutered ASAP. You could also talk to your vet about giving Dog A an anti-anxiety medicine daily to see if this helps. If not, you may consider finding Dog A a home where there are no other pets. I hope this helps.

Neutering can sometimes help with interdog aggression, so if you plan on keeping them both, having them neutered may help. If they are constantly fighting with each other, it may also be time to bring in a professional who can view the situation in person and help formulate a training plan to get the dogs OK around each other. You may need to keep them completely separated and slowly introduce them in a neutral location such as on a walk, and then only have short monitored sessions until they can be trusted around each other. However, if one dog is lunging and growling before even being introduced, seeking professional help is best.