OK I did one a long time back and it turned out good, soak the hide in sulfuric acid and water, or you can urinate on it ( it worked for the Indians) Or i believe rubbing the brains on it works. Either / Or this process locks the hair on, I believe it was over night. Then rinse really well and let drip dry, when it is damp not wet to the touch you could rub lanolin on and work it into the skin to keep it supple and playable. Not sure of the mixture of acid to water it wasn't a lot of acid but enough to remember ALWAYS add the Acid to the water NOT the water to the acid very violent reaction.
I used a topical yard trash can 35 / 40 gallon in a well ventilated secure location, away from Cats dogs and children. It can be done without a bunch of hassle, who knows you just might start a cotton tail collect to make some gloves and coat for Mama ?