Absolutely true regarding parental decision making being the very best-- that's why I put that little face after my last post....! I totally agree.
But another side to this multi-sided coin: I am a little confused as to why we believe that sanitizing reality is best for our children (I have done this as well with my own kids at times). What is so wrong with the reality that snakes eat and so we feed them when we have them in our care? What is so wrong with allowing a kid to understand the fact that the momma bunny pushed out a baby (as sometimes happens) and the baby bunny died. Feeling sad is okay. Processing through that sadness is healthy. Allowing the snake to eat this dead bunny is okay and I think it is okay for kids to be exposed to what is natural.
This is simply fodder for discussion and is in no way to be construed as trying to tell the OP how to best deal with the subject of death with her children.....