Let me start by saying I have a small very happy, healthy well maintained flock of 4 right now. (We lost 2 over the summer from extreme heat and humidity conditions) My flock security is my main priority compared to the one I'm about to describe. I have a family member who has a flock of 25. I'd say most are healthy "looking" and probably around 8'sh that look rough. Some have no tail, vent or back feathers and others have just the stem of the tail feathers but only little of the actual feathery part (if that makes sense.) I noticed today one that is a little bit lethargic and keeping her eyes shut a lot with slight tremors in her neck area. The area they are kept in is maybe 12x15 fenced in, including an enclosed portion they consider 'a coop' because it has 3 walls and a roof. This area by the looks of it hasn't been cleaned of droppings in 6 months. The waterers are basically big metal hog bowls that aren't cleaned regularly. Nutrition is a joke despite me telling this man for at least a yr that they need constant supply of pellets/crumble and not crappy junk. He gives them literally all the scraps of 2 people, food that is being discarded from stores despite what it is whenever he gets it, and probably about a pound of feed...for 25 chickens. He has a 10 lb feeder and a feed trough that is always empty and when I questioned him about it his response is he doesn't fill it because they'll fight (he throws their food on the ground). I found moldy dirty bread in there today. (At this point I went off on him about everything and said I would call animal control if he didn't get his act together and care for them properly. I did say first that I would help get everything cleaned up as it should be and if it went downhill again then I'd call.) Now since y'all have a sense of the conditions I'm dealing with how can I safely clean this area up without bringing anything back to my flock? I can bring a change of clothes if needed but what other precautions? Whatever suggestions you have is greatly appreciated. I really want to help these chickens myself but not if it'll risk my flock. Also I may be taking 4 of his chickens that my husband wants to have. But he's fully aware of the 30 day quarantine and even then if there's any symptoms of anything I refuse to integrate them to our existing flock.