Build up a defense to wounds? You know how plants in the past have evolved into toxic plants so the animals wouldn't eat them. I was laying in my room one night and thinking about this: Could deer eventually evolve and become immune to arrow wounds. Over time would their vitals shift between their shoulder blades? (That may be a new reason for a faster bow. Mabey Len has thought about this and that is why he took that shoulder shot? Just messing with you Len.) Do you think it could happen or do you think they would stay the way they are to control their population? This has me stumped and if it is true, It is called the Zak Effect ©. Pat. # 7852425874