binders....I have been wondering the same thing. We are new to the San Lorenzo area with no irrigation...so no beautiful green grass! I got 9 chicks and 2 goslings 2 weeks ago. My first geese...and it has been a challenge. Right now I'm feeding chick starter and chopped romaine lettuce. Tried to get a small patch of grass started...with no luck! Had to put them in the bathtub the first week because my new coop doesn't hold the heat. Now it is cold at night (but I put a light in) and hot in the day! That is So. NM high desert! I'd appreciate any suggestions!