Ok so they sprayed. But what was the tooth mark bite that was n it the day before or a few days before this happened? I still think it was a rat/mice. I don't know I think this will be a mystery. I'm very sorry for your loss. Keep those traps out and do NOT give up. Aslong as your other babies are safe right now that is what you need to take care of. Make sure it doesn't happen again. HUGS