I don't know if it is true, but some people say that when wolves kill a moose in the winter, they first eat its stomach - because they need that half-digested green stuff. Well, but since I'm not that interested in eating contents of herbivore stomach, I've been thinking about trying to grow some green stuff in my own kitchen. Like sproutings peas and buckwheat. Yeah, but so far I've only been thinking about it - maybe next winter I could actually try that =)