when you have poor garden soil, extra road kill is one of the best things you can add to it, just bury it deeply enough and the other animals won't bother it.
i've been burying everything in the gardens here for years and the soil is getting pretty good by now in some gardens. have way too many to improve all of them at once so i pick a few each year to add more things too. it all helps. organic matter and trace nutrients in all life is best to not waste when the soil is poor.
if i had a tougher stomach i'd pick up road kill other than what gets hit out front. it's that valuable... a few deer or a connection to a meat/deer processor would be interesting, but i have memories of my first gf's business place where they chopped up beefs and some barrels that stank beyond stank. just no real stomach for that sort of thing. wish i had.