Hi everyone. Really happy to finally be a member. Have been utilizing this site and all the great tips since my boyfriend and I bought a new home last fall and inherited a flock of 5 chickens. 1 Black Australorp, 1 Plymouth Barred Rock, 2 Sussex, all going on 3 years old. Also one bantam Plymouth Barred Rock they kept from their previous flock who is going on 6 years old. We live in the city so they are truly backyard chickens. We've had them since September and all seemed to be going pretty well until recently. We noticed the bantam had a poopy butt that was just getting worse. We gave her a bath, but she continues to have diarrhea and is losing feathers in the rump because of it. At the same time they have all started intensely shaking/twitching their heads very compulsively and continuously and picking at their bodies a bit more. Their combs & wattles have gotten pale and dry looking and they have a few black spots on them. After trolling the site and reading every related post to those symptoms I concluded it was probably mites or lice. We managed to catch and inspect the bantam again, nothing other than the poopy butt problem. Caught one of the Sussex and nothing. No mites, no bites, no eggs at the feather shafts and a really nice looking vent. Very moist and pale pink and no mess. I also believe the girls might be losing weight. I feel like their chests seem more protruded. They are eating well, and still laying. We get 3 eggs a day from 4 layers. Am I crazy? I believe in my gut something is wrong and going on here, but can't seem to put my finger on it. They just seem very uncomfortable with all of the head-shaking and I know pale combs are a bad sign. Could worms be the culprit? Is there a harm in de-worming when you don't know for sure there are worms? Our girls do not like to be handled and we are a bit out of our depth. Anyone have any ideas?