I've read a lot of posts about chickens loving cabbage and spinach,etc. my girls free range from sunrise to sunset everyday. I come out everyday and bring them treats, BOSS, fruits,etc. but everytime I try to give them greens, they turn their beaks up at me. I tried the cabbage in the coop thing and they weren't interested(though I will try again this winter). Are they just not interested because they get their fill of greens from free ranging? should I keep trying to introduce them or should I wait till the grass goes dormant?