Probably it's the part when i don't like to watch the dying mouse, but if it is mouse that is going to die anyway, what's the point of caring how exactly does it die? Would it suffer because cat plays with it, or because homeowner it is the most convenient way for the homeowner to kill it, is not important. If it was important, i would try to not allow it to die in the first place, but if i am ok with its death the whole "no suffering" thing is illogical, self righteous, and insincere https://youtu.be/pvhYqeGp_Do?t=26