I have had one poorly hen for a while, she has a very pooey bum, pale combs, and generally looking off colour. I wormed using pellets with wormer and gave her an Epsom salt bath. If I put my hand under her bum it feels round and hard, not skinny and bony like normal. She was still eating and dotting about so I was vaguely wondering what to do. Now I think another is going the same way, these hens are probably about 4 years old
Any ideas?