Be careful with cutting grass for the chickens. My favorite chicken died from a sour crop - when I autopsied her I found out she had eaten too much grass clippings and it had tangled up into a ball and clogged up her crop. When chickens eat grass, they snap off little pieces of the top of the blade of grass, they cannot chew an entire blade of grass down like a cow or goat can. I think a small amount is OK, but I don't know how much is too much. Better to be cautious than not, I think.