Yesterday I moved my chicks from the brooder on my screen porch to an outdoor run. As they were getting two crammed in there. It was getting quite dirty quite fast. I noticed one with the wings a little dropped and looking a little lethargic so I went ahead and took it inside. Last night the crop felt very full and squishy. This morning it felt a third to a half of the size but instead of squishy more like soft Play-Doh. Poops are still normal. Has not eaten anything. I mixed two drops of oil of oregano with some coconut oil and gave that to the baby. Put oxy drops in the water and then making sure to keep the baby hydrated. What could I possibly be dealing with? They were not exposed to anything environmentally as they have been on my screen porch. The brooder they were in was getting very dirty very fast which is why I moved them. So possibly a dirty brooder. Everybody else seems to be fine. And as I said this chick still has normal poops. I also gave it some amoxicillin last night and this morning because I was worried about upper respiratory but I have not seen any sign of that.