Hi, I have a flock of 20 chickens. 3 of these (which I have separated) have feather loss and redness on their bellies, from their chest to in between their legs. One of these chickens has scaly foot mites and is being duly treated with vaseline for this. The other two have shown no signs. All three of these hens have feather loss and redness to varying degrees (as shown in the photos below). It is moulting season here in New Zealand, so I am really unsure. Is this moulting or mites?