You need to take him in for an assessment by a behavior vet or behaviorist and not do any obedience until he is helped with his reactivity and fear concerns. He is not going to be able to learn when he is so fearful anything anyway that will stick or make things better. YOU have to train under his threshold and you have to understand what that is first.

That GSD needs to be reported for biting. It bite you not your dog and lacks self control and is a danger.. Little one just proved himself right as a dog bite you and cause you to get all upset at him and the other dog... big scary event and reinforced his fear and proves other dogs are to be kept away from or made to go away.... Poor dear boy, he doing all he can to keep safe and he is doing it the only way he can.
He needs a resoicalization class once a behaviour person says it is a go.

For now until you find someone keep him away from other dogs so he stops learning and being reinforced that Mom is scary around other dogs and other dogs make mom freak so I need to freak out first.
Last give him a hug he doing the best he can with what he has learned and just needs a break.

JL

I also have a Yorkie who at age one deceided he did not like Big Dogs any longer! Who knows why. He was friendly with a huskie since a puppy and one day after his first birthday while walking him he went nuts seeing his friend
which starled me to death, broke away from me and actually attacked the husky! I almost fained on the spot! Was this my dog? Since then every big
dog he wanted a piece of! It's been three years and we are still working on this. He has gotten much better but I have to see the dog before he does then I can talk to him while we pass. He seems to fear them. Never been
attacked or scared in any way just deceided this on his own.
I have watched Ceaser and Victoria and did my best to follow their lead.
It actually works but you have to show them your not afraid and be their
leader. Calm and assertive Ceaser says.
As long as your dog has no underlying problems after being checked by
a vet you have to become knowledgable and use your common sence
on knowing what your dog can tolorate. Taking him unleasehed to a park
is not an option.


Going to the vet's or groomer ,when he did go, was never a problem
if a big dog was there. Only on our walks.

Good luck.

My toy poodle has huge aggression issues towards big dogs. She is all of four pounds and it started last year when we took her to an apple farm and while holding her ( I dont let her out of my arms in public places) a very large lab jumped up at her and snipped at her, I quickly pulled her away and we left. He didnt bite her thank god. Since then she has issues with big dogs, all of them, even ones she see's while we are in the car etc. She growls, shows her teeth and barks obsessivly untill the dog is out of site. I do not take her anywhere where there are big dogs if can help it. If we are at park (she is always on a leash)and see one coming we pick her up and go the other direction. She gets so stress out. :(

I agree with the others, your pup is too small to be running around off a leash in a dog park that has big dogs. Just the big dog playfully running around could cause harm to your dog and if your dog is aggressive even more problems could arise. Some one could get seriously hurt.

I also agree that you should have him checked out by a vet just to rule out the possibilty of health problems. Is he neutered? I know that some males will have agression issues when not fixed.

What you are dealing with is what is called leash aggresion or frustration.

Dogs do not walk at each other in a stright line if allowed. They bend out and around to the butt end.

We make our dogs walk in a stright line and tighten up the leash as we know they are going to go of like a rocket. As soon as the leash gets tight off goes the dog like a rocket.

At the groomers they are free to do as they please and are under the conrtol of usually some pretty dog wise and the dogs they know it.

JL