Oh my! that is too funny, I didn't know that chickens could get gasI have found that to be true as well. They get finicky and don't eat as much of the layer feed. I also monitor their poop and it seems that the spinach and sweet potato turns it darker and looser. I do not feed anything spoiled or with high sugar or salt content. I fed them soaked navy beans once which they loved, but they had terrible gas. I picked one up and it was like I sat on a whoppie cushion.