Just a quick question.

Well.. What would the situation be causing your dog to fear bite at other dogs?

Sorry, need a little bit more info before anyone can answer.

Are you saying that your Lab fights out of fear?

Whether biting or fighting, you need to prevent it through training or keep your dog away from other dogs.

My dog starts by playing and being happy wagging her tail then all of a sudden she will get scared I have no idea why and attacks, it doesn't seem to matter the size of the other dog.
She also leaps at runners and bikers and buses and barks especially when they come up behind her.
When she was younger she was nipped at by another dog not sure if this has anything to do with it.
We have tried to muzzle but she pulls it off, we keep her on a lead at all times when we go for a walk unless there's no one else around as she needs a run.
She is fine with people it is just other dogs.

Have you tried obedience classes with her? A controlled environment will greatly help you while under the supervision of a trainer who specializes in aggressive behavior modifcation.

Do you take her to dog parks?

You should read up on dog language. Just because she is wagging her tail, doesn't me she is a happy dog in that moment. Many dog bites have come from dogs with "happy" tails. Does she do a play bow? Or does she allow the other dog to do the play bow? That is actually a very important question. If she does a play bow but then turns aggressive, that is usually a sign of an unsocialized dog that hasn't been spanked by a mama dog-type figure. If she doesn't do any type of play bow, then she doesn't want to play and only tolerates the other dog for a period time.

Maybe try a cage muzzle. Its not constricting like a regular muzzle. She might feel more comfortable with it on. Sometimes when you constrict a dogs mouth completely, they freak out more and become more aggressive. Cage muzzles will allow her to pant, eat, drink and snap at something if she feels she needs to protect herself.

I think you would great benefit from some serious obedience classes. You're not going to find anything serious from Petsmart or Petco, you're going to have to find an actual behaviorist. Talk to your vet or even the shelter, sometimes they may know someone who can help you.

You took her to a class as a puppy. She's an adult now. Time to do a refresher coarse. You have new problems besides house training. Going to obedience with an trainer right beside you may work very well for you.

Obedience classes aren't a one time deal. You should actually do a puppy class, go back at 1 year of age then go back after a couple of years. Don't sign up for beginner classes.. Even agility will do you great good. But you need to go back.

From your description, its very hard to see why your dog does what it does. In order to properly diagnose what is wrong with your dog, someone has to physically be there that can read your dogs body language and see what triggers your pooch to attack.

For the time being.. Get a cage muzzle.. Or maybe even a gentle leader. Knowing what your dog can do is the safest way to own an aggressive dog. And controlling her teeth is going to save you a lot money and heartache.

Also.. keep in mind.. The definition of a socialized dog is a dog that can go anywhere without making a scene. Your dog appears to not be very well socialized. What you could do to maybe help her out, go to a park and sit on the bench for 15 minutes. Ignore her whinning. Ignore her pulling. The only time you praise is when she is either sitting, laying down or standing quietly. This type of training is actually your dog traininer herself. She will learn that nothing happens until she does something. If all you do is praise good behavior.. you're going to see it more. Your bench sits may last longer each week. Pretty soon it may graduate to a walk up the street and back. This type of training will take a very long time. Patience is key. And actually set up times during your walks where you do this. It doesn't have to be the entire time. But you should include small lessons such as this in your walks. Eventually, your walks will become more and more enjoyable. But like I said, it takes time.

If you see another dog.. just keep walking like you don't even see it. If your dog growls, pulls towards the other dog.. IGNORE IT. Any type of attention is enforcing her behavior. Also.. Be aware of YOUR body language. Do you tense up when you see another dog? Do you pull her into you? Do you fumble with your leash to bring it in as short as possible? Those are all signs to her that you are nervous about that other dog. Packs feed off that type of body language. She probably thinks your ready to attack that dog also! Just relax. Ignore the other dogs around you.. focus on your dog. Sign up for classes again ;)

Can you suggest a behavior class in westchester ny

Ht