What should/could you do when your dog is attacked by another dog?

It's something you really have to be careful about. It's best if a professional shows you how. I could show you how but it's harder to explain. The best thing is to prevent it. If you see the dog coming, do a body block. Don't get bitten yourself but calmly and coolly get in the way and deter the dog with a no or a "eh" noise.

If the dog gets a hold of your dog the last thing you want to do is to pull either dog off. That causes tearing and can make the bite even more serious. Puncture wounds are so much better than a tear when it comes down to it. First thing, drop your leash. You don't want your dog to get tangled and that will prevent you from instinctively pulling your dog away. Then you need to get a hold of the dog that is attacking. This can be dangerous and many people get bitten breaking up fights so be careful. If you can, grab the dog at the base of the head so that it can't turn on you to bite. Most dogs will let go when you get a hold of them. If it won't let go then you can grab a hold of it's back feet and pull up. When dogs are put in that position they open their mouths.

The most important thing to remember is to be calm. Be calm, keep your cool, and get in there. Don't scream, panic, pull your dog away or get bitten yourself. Of course, the best thing to do is to stop it before it happens.

EDIT:

If you have a smaller dog, do not pick it up. Picking up a dog actually can make it more of a target for attack and you've really cut down on its ability to get away from the attack it if can. Also, the last thing you want is an angry dog attack coming up toward your face. Keep all dogs on the ground and break it up.

most attacks i have seen,the attacker is going for the other dog...the reaction most have is to pick their dog up,and out of range...most times this works and the offender usually will not go after the person...usually...the best thing to do is carry a stout stick or broomhandle...dont be afraid to smack an attacker...it may be the only thing you can do to save your dog...i would report any loose dogs(only) if they are a problem...another method is to look at their body language...if a strange dog is "stalking" your dog,that is they

move slowly with their head down,and their eyes are going from your dog to you,you can say he is a little un-sure,as most lone dogs are...these types can be scared of easily,but it takes balls to do this...wait till they get within a few feet,and jump at them,while making the scariest noise you can....9 time out of ten they will run from you...two or more attackers is pretty hopeless without a gun so only try this with lone dogs,...they are wimps when alone,and not protecting something...

very important...if the other dog has a collar,grab them by this...if you think you are strong enough to hold them back...

punch the dog right in the nose! it should back off. if you arent too fond of putting your hand near its mouth, kick it hard! and im not suggesting these as means of guarding your dog. just do it if your dog is in danger of being seriously injured or killed.