This is a very good idea. I have no experience with fractures (though I'm sure I will given Marmalade's clumsiness).just curious, did the vet xray the foot? it just looks "wrong" to me, I have ducks and clumsy ones at that, the last time I had a duck foot look like that, one of the bones was broken. Just a tiny fracture, no displacement or anything but it looked similar to yours.
Just asking as a possibility. Not diagnosing or anything.
Maybe ask your vet about that option?