Another mystery. Not only do we have a mystery tail tweaker but we have a mystery pooper too.
Unusually, poor Cagney is the victim.
However, he is partly to blame in that he was sitting on the bottom rung of the swinging perch when the offending poop landed on him. I am guessing the poop landed on his back, rolled down his side & settled below his wing. Bezukhov was sitting on the perch directly above him. Was it him?? Phineas was monitoring the toyboys above from the landing platform. Was it him???
Cagney carried the poop for a few hours. It must have been hard when he finally prised it off.