Two eggs this morning when I let them out so I really don't think that it is stress. I have not checked for mites. You're going to have to explain how to do that because I haven't the slightest clue. They both drink and swim out of their pool, is it safe to add the vitamins to that source of water?
This is where they roam for the day until it gets time to come inside at night.
My goodness what a pretty place. I would put vitamins in their drinking water not pool water. And if they have access to pool water daily I doubt very seriously they have mites and I said they because it usually includes the whole flock when you get a mite infestation. To look for mites though part feathers and look at their skin mites are teeny tiny little specks like pepper they crawl they can get on us but don't bite us but they do bite poultry and can make them anemic. I have had mites get on my chickens but never my ducks and they live in the same building as my chickens with only a wall and door with chicken wire to separate at night. So I don't think it's mites here you need to be worried about.More than likely what your seeing is an itch that escalated and using Blue Kote will help it heal and distract her from chewing hopefully. Where do they sleep at night? you said bringing them in? What type of bedding Lice can come in with straw they like to get in the hollow stems, so look at base of feathers for clumps of white build up. I really doubt you have either of these parasites though.
I hope you can see this link it has info and pics of what to look for with mites and lice.
Edited by Miss Lydia - 12/6/15 at 6:07am