I am a third year gardener and am having trouble with something eating my lettuces this year. I think it has to be a rodent of some kind. I have three varieties of lettuce in a bed with some swiss chard and my poor lettuces are getting mowed down from the top. Not far down enough to kill the plant but down pretty far. I dont see any signs of rabbits. We do have field mice and voles and 13 striped ground squirrels here in colorado where I live. The interesting thing is my lettuces are getting mowed down but absolutesly nothing else is touched. Not my chard ,beets, spinach radishes,... nothin. Any ideas on what it could be and what to do about it? Thanks. I found out about his site from backyardchickens.com and I am execited to be a part of this forum. Any help would be greatly appreciated.