You might remember Dolly Part-hen. She was born with something wrong in her crop, perhaps some kind of tumor or obstruction. She was slow to grow. Some suggested she be culled from the flock, but I was curious to see how she'd make out. And she's done fine, except she still has the problem.
You see how her crop gets overly full and bulgy. It looks terribly uncomfortable. But she seems to get by alright.
The skin is pink and stretched. Gradually it will ease back down to normal size, then she'll fill it up again.
Living in the country ain't for sissies!