EDIT: This has been up here for ages with a bit of a serious bug. It doesn't work after a while. Its kinda hard to fix cos it could be a lot of different things. Sorry don't seem to be able to fix (after about 3 mins. or so all the Sheps do a lemming of the top left corner.... no idea why)
Sheps live for 11 seconds
1 extra second and one extra offspring per grass clump consumed during it's lifespan.
Every offspring is a slight variation of its parent.
Successful variants propagate their genes more effectively.
I wouldn't advise changing mutation rate. Don't make too much grass or trust me you will regret it :S (LAGGG)
Yes, i know grass rate is wrong... it should say "Grass Spawn Max. delay in milliseconds"