Hello, I wonder if anyone can tell me what to do please. One of our girls (about 18 months old) has developed a large lump on her back. I didn't notice it till I saw her feathers wouldn't lay flat this evening, and caught her to have a look. It's huge - there seems to be a sort of scab-like, cankerish area with a lot of dried earth on top of this so the whole thing is like a small tennis ball. She seems normal in other respects, I can't tell if she is laying or not as her eggs are like one of the others. She seems cheerful though, not moping around, eating Ok I think. There was a rat in a few weeks ago that may have bitten her, I didn't notice any blood at the time but there were feathers everywhere - but then all of them seem to be moulting at present. I don't know whether to bring her indoors and wash off the earth, or assume it is a tumour of some sort and she might be in pain - should I take her to a normal vet? We don't have a poultry vet here. I don't know what to do, so any help much appreciated. Thankyou.