Look into the web site www.carefreeenzymes.com or wwww.theholistichorse.com there are natural remedies for mites, lice and worms. The Poultry Protector product is good to help build up immune system from what I hear...add to the water supply. My chicken has lived for two weeks with me feeding...
Yes I am treating my chicken with diatomaceous earth (food grade)...because I found her (Gladys) infested with lice. I am figuring her anemia was caused by the lice. Also put some in the food in in clean shavings after I scoured the hen house. I have not found mites. I may have waited too...
I am having the same issues with a 16 week old pullet. I took her to the Vet's only to find nothing specific...no coccidia...but on the "safe side" put her on antibiotics along with probiotics. Added vitamins and electrolytes (Agway) to the water to boost her energy. She is not looking good...