I wholeheartedly agree with the opinion that if their dogs came onto your property, it's the other owner's vet expense. Doesn't matter which dog started the ruckus, their dogs were not on leash (although no leash law applies here) and not on their own property. You've already gone the extra mile in trying to assist with the emergency care of their animal. For her to circumvent your expertise and go to some high-dollar money grabbing vet for basically a second opinion is out of her pocket - not yours. They simply need to understand who's responsibility the extra $1200 expense is - and it's NOT yours. Their choice - their dollars. We have pretty much as similar situation here. Had a new neighbor, albeit a renter, with a pit bull dog and one other young mix breed. The huge pit bull came onto our place, 13 acres, and up to our back door challenging anyone that wanted to come outside. She, the pit bull, made two other challenges to me, also on our property. After the county animal control came out the 3rd time, he warned the new neighbor that the next call would be a $600 fine. And advised them that I have every right to simply kill the dog if its on my property, on sight. Now, I'm definitely an animal lover. The last thing I want to do is to put someone's pet down. But on the other hand, that pit bull was definitely a serious threat; it meant business. I've owned pit bulls before, and know they can and will kill, be it another animal or a person. But I will not tolerate being challenged, especially on my own property. As a matter of perspective of the kind of dog owners they are, we see their dogs - the pit bull and a young mix breed, chained up in their back yard 24 hours a day - no matter if it is freezing cold out or pouring down rain. It seems to me that people of that mentality do not deserve to own dogs.