Where is the blood drawn from for a heart worm test? I am assuming it is the jugular in little dogs. Lion is nervous at the vet- he is a fear biter, so he snaps at the vet or techs when they are doing things near his face. He hasn't had a problem with injections so far. I am wondering how they will get blood from him if he won't hold still. Will they have to sedate him? I am going to ask the techs when I go in of course, but I was just curious if anyone had experience with something like this.