Back in October we found Ollie was unusually quiet all the time and when out of his cage he didn't want to fly anywhere. We took him to the vets had his bloods done and some xrays but nothing showed up. The vet put him on a week long course of antibiotics which seemed to improve his condition for a few days but then he went really downhill again but he had also started preening himself very aggressively to the point of making himself scream. I didn't think he was pulling his own feathers though as there was none around his cage and he had no bald spots. The vet suggested it was an infection and the antibiotics hadn't been long enough to clear it up properly but upon checking under his wings it was discovered that he had two small bald spots right in the wingpits (which is why I hadn't noticed) which were red raw and scabby. My other bird Harlie was 100% fine.
All in all with no proper diagnosis Ollie spent until January on antibiotics which seemed to clear everything up nicely, everything has been completely fine since then, I check under his wings often just to be sure. This morning I heard him screaming like he was in pain but when I came in the room he looked like nothing had happened. I looked under one wing which was fine, then I looked under the other and right in the pit there are feathers missing again and traces of dried blood.
I've noticed this afternoon that Harlie also seems to be preening herself agressively too then shreiking out like she hurt herself so looks like I'm headed to the vets later this week.