These do have a bleed effect, but only when wild, this can be seen by eating a rare flower near a male, it will kill you in 4 hits no matter how much health you have.
A female megaloceros should get a fleeing ability when it senses predators or enemy bases in PvP. And at least let it harvest berries ! If you want a suggestion for more it can do make a tip addressed to -Bobbert
These guys deserve more attention! Great harvesters, powerfull-ish if it's a high level, fun to have around, and if you are a Canadian you NEED to ride it!