Unenforceable contract?

I have entered into a contract that I believe to be unenforceable.

I purchase a dog and in the contract it states I can not do any of the following without written permission: breed, sell, trade euthanize. This is normal in dog contracts but at the bottom in all caps it reads "ALL TRAINING MUST BE DONE BY blank KENNELS"

Now at the time I was okay with this. I was employed at blank kennels, I intended to train there.
The contract doesnt state what happens if I breach that clause nor does it state what is considered 'training.'

My interpretation of this clause was that I can not send my dog away from ME to be trained by anyone except blank kennels.
If the leash is in my hand.. I am training my dog. However this man has threatened to sue me for joining a local dog club where we all work as a group to train our dogs.
Also: His kennel is too far away, too expensive and I consider him to be abusive physically to the dogs and verbally to the people around him. I just dont see how this contract can be legal since he is trying to FORCE me to do business with him and only him.

Please advise! I intend to contact a lawyer. I feel like im just taking care of HIS dog instead of raising MINE.