We’ve only had our chickens since July and one is sick. She was 16 weeks bought and so now approx 32 weeks, a Legbar and has looked amazingly healthy up til now. They’re fed good quality food and kept very clean. We noticed yesterday she wasn’t responding to being called in, we free range for around 4 hours a day. Today she kept herself separate from the group. I went to check her and noticed the comb was dry and shrivelled and had white patches. When I picked her up water dripped from her beak. I put her away separately and went out to buy a hospital coop and when I came back picked her up and massaged her crop. A large amount of liquid was vomited up. It was smelling badly. A few hours later I massaged again but nothing came up. We’ve put her in her own coop with some apple cider vinegar in the water. Her crop feels less full. Would opinion suggest this is impacted or slow or sour crop. We free range in a field in the Uk. We wormed in August. Oyster grit always available. We do soak bread and break it up as treats plus carrot tops etc.