HELP!!! 2 of my chickens in the last couple of days have started to loss feathers. Initially, I thought one had strayed a little close to the dog (4 kg Jack Russell x chiuhuaha :lol: ). But now both look like they have some sort of mange. They are Rhode Island reds and my other 4 chickens don't seem to be affected. I have had a look at them and they don't seem to have any creepie crawlies on them. They don't seem to have lost weight or off their feed. Should I quarantine them?