We have three seven week old chicks at the moment. We think two are pullets and one is a rooster. The one we think is a rooster seems to have had some trouble walking over the last week or two - almost as if it's too heavy for its legs. This morning my son said he thought it had an impacted crop - there's a small swelling under its beak. I've tried to feel it, which the chick doesn't seem to like. It doesn't feel too hard. For the moment, we've separated it from the others, but it can still see them. It has some water, but no food. I'm attaching some photos - can anybody tell me if it looks like an impacted crop? Thank you very much.