There must be a way to put them back :-( The server only sends a message saying 'this beastie is a skellington', it doesn't pass through the exact dimensions of the skellington (otherwise it would takes years!). Same with wolves. So it should be a simple thing to trick the client into loading one model instead of another. Which also means you should be able to trick it to load the decent skellington, but keep the decent wolf.
Unless of course someone can scale down the wolf... :-D
Anyone got any ideas? I think it's just a case of changing file names, much like changing some of the thunder sounds to be empty files - you then don't hear thunder.