I know the feeling! To put your mind at ease,,you nor your other pets can be affected be these mites and lice. They feed exclusively on poultry and eat dead skin ,feathers and their blood(mites) . They can be treated with a dusting powder you can get at your farm supply store, you must powder right down to the skin and all over them,except the head.
Remove nesting material and replace with clean stuff,,sprinkle the powder under the nesting material to kill any that come off the hens. Re powder them 12 days after the first treatment to kill any hatched lice and mites. Some people completely remove the whole coop materials and disinfect every crevice,,I as well as many others know that lice ect are recurring and therefore treating them every 8 weeks with the powder will reduce infestations..and cause less damage to your birds. Check them before the 8 week treatment to make sure you don't treat them unnecessarily,,,as they may not have them again. If your hens Free range or wander in the yard they are almost guaranteed to pick up lice and/or mites from other wild animals. Just keep them from becoming an infestation with the directions I gave you,,,best of luck,,:)
Just in case anyone else should find this question, (I know, it's a 2yo question), I just want to say I don't think the above two guest answers apply in Australia. Not with lice anyway, I despise them! I live in suburbia and when the pigeons or other feral birds come to deliver lice to my chickens and if they get on me, they're NOT just interested in the chooks. They bite worse than mosquitoes and leave a bite that itches for days and can get infected. Some things that I have found work are making sure the roosting area is kept as clean as possible, each time you clean their area out put lime down and even paint the walls and roosts with limewash. Good pet shops and produces should sell a powder/dust that you can treat the chooks with.
If they are in a pen put seven dust all over them and the ground. They'll roll in the dirt. Once every two weeks, and when they're gone once a month!
You can get a powder from good pet stores for red mite and lice. We use it and it does work. If you leave them with lice/mites you will find that they will stop laying because it will make them feel ill.
I too have used sevin dust effectively, spreading it all around the pens, and even lightly dusting the birds themselves.
If you want to get rid of mites,fleas and ticks on your chickens, then you will first need to bath them. If you can find a mild shampoo that would be safe to use on your chicken then that would be a good idea. If not then just bath them thoroughly with warm water.
Once they have been bathed, place them in a clean, seperate place to where they are usually kept. You will now have to ensure that their living quarters and around their living quarters are cleaned. Use a disinfectant that is safe for your chicken and throw away any bedding that was being used. Literally everything needs to be cleaned to ensure that you get rid of the mites and fleas completely.
Once you have done this the chickens can then be placed back into their living quarters. Ideally you should look into the reasons why your chickens may have the problem in the first place so that you can avoid it again in the future.
I sprinkle a little bit of seven dust in each nest .
No the mites and lice will not harm your pets or you. The mites and lice might bite you or your pets but will die in a hour because they need to have a chicken as its host.
Hair Clean 1-2-3 by Quantum - My daughter was the only one who didn't get it back. All Natural and can wash many times. - Stay on it every 4 days for a couple of weeks. Get all shells out. Cover head with shower cap while in house so you know it doesn't spread anywhere else
I had a hen die and when we dressed her she was full of a yellow ball that looked like yolks why/
Sounds like the common bird louse. You will have to treat their environment and them. I would contact a vet about it for the proper treatment