Let's not be too hasty, I said I was confused as to why such a thing would happen. She said the dog was ill, it had behavior changes. It could be the dog was aggressive. I know when my dog gets her heart worm medication she doesnt want to be bothered at all for the day after, and will give a soft growl if you get too close. Maybe this dog was becoming a little aggressive and snapping because it wasnt feeling well. Maybe the treatment is very time consuming and best for the dog to be in a place where there are people who can provide that kind of time, and care. This I would understand, Havent we all had to leave an animal at the vet for the day so they can run test/provide treatment???
The confusing part to me is that she sounds like she will not get this dog back.......maybe the illness is terminal and they are making the dog as comfortable as they can until the dog passes? Some would say it would be more humane to put the dog down if this were the case, but I know some people just cannot do that. So let's not be too hasty. I am not judging, or at least trying very hard not to.