Salem

I was killing rabbits when out of no where my GF says..where is there health bar...

There isn't one, but do you really need one for bunnies?

lolz no i donno just thought it would be helpful to some ppl :p

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.