i dont think this is an emergency but its something that bugs me. ive seen my outside chickens do it now and then, maybe once a day or if they've gotten wet....they 'shake' their head (think wet dog shaking water off..that kind of movement but with the head/neck) but my 'inside' chickens (chabos, frizzle chabos, bantam cochins) seem to be doing it constantly, every time i look at them they are doing it! i first thought maybe a mite/lice issue, so all got treated with ivermec pour on.....didnt help. so i thought then maybe the bedding, so took out all wood chip/sawdust and gave them just straw. no help. if it was just the frizzle chabos id think maybe some of the frizzled feathers were annoying them...but its most of the others too? any ideas whats causing it?