Can i sue vet. for malpractice if they made a mistake that caused my dog to suffer?

First thing you need to do is bring the dog to an emergency vet of some kind. If the previous vet is the cause of why you need to go to the new vet, you may have a claim against them.

No, unfortunately there is no legal claim for the pain and suffering of an animal. I hope your pup can get the care that it needs!

I suggest you immediately take your dog back to the vet or to a different veterinarian. Your dog does not have a claim for pain and suffering nor do you. Unfortunately, the law treats your dog as if it is a book or car or a pencil. It is merely considered your property.