Feral with coat in poor condition

Some of you will remember me from when I had Baz as a house guest. Unfortunately he went back to join his friends by the village bins, about a kilometre away from where I live. I go up to feed him every day. I have to give the other cats some food as well.

One of them that I call A D cat, because he leaps from one thing to another with a short attention span, had a bad wound on his back a couple of months ago. It seems to have healed up OK but he has lost all the fur in that area. It has got worse day by day and now you can see his shoulder blade completely bald. He has also lost fur on his head. I put Frontline on him a couple of weeks ago in case it is a flea allergy, it has made no difference. I have looked hard but can't see ringworm circles on him.

Does anyone have any idea what it could be? The other cats are unaffected at present, but I would hate him to have something which would spread through them all. Apart from his coat he seems lively and well.

Would appreciate any ideas.

Thank you for helping these kitties! The flea allergy is the first thing to come to mind, so good you thought of it. The only other thing I can think of is that the wound has affected his hair follicles. Anyway you can trap him and have him vetted? He's a newcomer, so he may need neutering and shots, too.

I will try and trap him, probably fairly easy as he is very friendly. Actually none of the others apart from Baz are neutered. Thanks for advice.

Oh, boy, then you have a bigger project ahead of you. Stabilizing the colony is going to make such a big difference in everyone's life - Baz, AD, all of them.

Good luck trapping AD - you are his angel.