Charlie bit Barry's ear this morning and it was, in Mia's words, 'pissing out blood', so we had to take him to the emergency vet at Essendon Airport. He will need anaesthetic and a couple of stitches, estimated cost $500- $650.
When we got back from the vet's Charlie, who had been banished of course to the backyard, forced her way into the house and ran around panting, she also checked the shed and the back of the backyard.
It's my fault. I keep ascribing logical behaviour to her ('jealousy', 'regret'). I am sure she would tell this story quite differently.
(Later: all is serene, though the wound looks nasty but well-stitched. The problem is of course really that Barry gets all the attention and Charlie isn't as cute as she used to be. It'll be OK in the long run I'm sure).