Well, this is a late follow up, and a rather embarrassing one (for me and for our cockerel), but I thought I would share the happy ending. Having bundled him unceremoniously into a cardboard box and whisked him off to the vets, she took one look at him, grabbed a wet swab and proceeded to wipe the black spots off his comb. She then proclaimed that it was blood spatters from the original wounds, and the most likely reason for the original small wounds? He'd been ritually pecked by his own hens whilst in the coop! Ruddy women! So the poor lad was moved to the 'hospital/broody' coop, about 100 yards away in a separate area near the house, where he stayed and recuperated (re-coop-erated?) on TLC, baytril and Nivea, until one day he decided he was missing his wives and flew over three gates to get back to them. Glutton for punishment!