Oh I know they can get out of anything Houdini's every one of them. Might need queen size for a seven month old. lol mud wrestling with a goose, I'd follow that thread.
Mudville here too. new geese are beautiful, they most likely will settle down once they know your care. as for the angel wing what about trying something like this?
This really worked to correct this Pekins angel wing.
Your right though may not be fixable but worth a try.. Keep us updated and...