You're speaking with Dr. Michael Salkin. Welcome to JustAnswer. I'm currently typing up my reply.
I'm sorry that your question wasn't answered in a timely manner. I understand the constraints you have in attending to Percy. Where is the feather loss, please? We don't know if external parasites are present but, if so, should be identified prior to treatment but in most cases a poultry permethrin-containing dust as well as environmental control should suffice. A recent study showed that mite populations could be controlled with dust boxes containing either diatomaceous earth, kaolin clay, or sulfur. Poultry using dust boxes with any material showed a reduction in ectoparasites (mites, lice, fleas) by 80-100% after one week when compared to control groups. Ectoparasite populations recovered when dust boxes containing diatomaceous earth or kaolin clay were removed; however, sulfur provided a residual effect up to nine months post removal. Provision of dust boxes may be a simple and effective method of ectoparasite control for backyard flocks.
Please see here: http://www.starshine-ranch.com/PeaCare.htm and pay particular attention to "capture" and "parasites". I'm sorry I can't be more specific for you from here. Please respond with further questions or concerns if you wish.
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