It doesn't matter what the quarry is, a game terrier will try and tackle anything, no matter what size or how many claws or teeth its got. His dog turned and ran away from the quarry, so for me the dog isn't game. But in saying that the dog does what SGS needs it to do, so that's fair enough.
I'll also add that I can only imagine how tough them Bobcats must be, Feral cats over here can be right tough b*****ds so I bet they're a right handful.
i think the terrier(or any dog for that matter) should have enough brains to decide when to stand and when to avoid stronger fighting quarr