Hi, I have this chicken (about 6-8 mo old) that is half banty frizzle and half millie fleur. My flock free ranges during the day and is locked in a good sized coop at night with straw bedding. He/she (haven't figured it out yet) roosts on an old wooden ladder with other chickens. It is not showing any odd behavior. It is eating, scratching, drinking water and moving around. Last night I reached up to pet it's chest and felt dried scabby stuff, so I took it inside to inspect. It has a huge hard ball where it's crop should be! It is almost as big as a tennis ball and very hard like a tennis ball! It's skin is stretched tight and it is scabby, with red and yellow scabs on the outside. At first I thought this was it's crop, but this looks like it has been there a while and I figure if it were her crop it would be dead by now. It is probably 2-3 pounds. I compared it's body mass with it's moms (frizzle) last night and they are very similar, so I don't think it is underweight. Other than being a little off balance when it bends over, it's behavior seems normal. I love this little chicken, but I am not prepared to pay for expensive vet bills. I am not squeamish if somebody were to suggest me cutting it open or something. Please help!