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Sounds like you have options but I did just talk with a fellow who makes his own butter so I am sure I have at least two sources, though both are near 45-60 minutes from you.
Lovely! Thank you

This is one form of Duck Foot. Another is version is when the fourth or rear toe is forward. It isn't going to be an issue for her but it would be something to consider if you were going to breed her as it is a genetic trait.
Regarding the gardening questions: I use my grass cuttings as a mulch and nitrogen cover for my garden so often now that I don't use it in the coop but I have. It smells nice at first even, like fresh, first-cut hay. Regarding Oak Leaves; these are acidic and you may want to be careful how many you use. Maple leaves make a great mulch that really encourages the worms, but oak can kill things the same as if you were using pine needles. If your soil needs to be more acidic, great, if not... well, take care.