If you really need to know to health of animals, just look up their initial health on the Wiki and pay attention to how much damage you do each hit. A rabbit has 2,5 HP according to the Wiki, but has a chance to turn into a March Hare on aggro, which has 30 HP.
Questions are for the help forum. Please, feel free to drop by.
It's been neat to see the evolution of a game. Salem has come so far, and still has far to go. Although frustrating, I think it's been an experience worth the effort.