Those several months methods are unnecessary. This method will forever preserve any reasonable sized animal foot without risk of bacterial growth in nearly 5 days.
Materials:
-70% or 90% Isopropyl (Rubbing) Alcohol
-Borax
-2 containers large enough to hold the feet
-Sink
-Paper towels / cloth
-Liquid dish or hand soap
-Animal feet
First take your chopped-off rabbits' (or any animals') feet and wash them in a sink using a bit of soap and by bathing it in a container of water. Continue this until the water stays clear, this indicates enough of the blood and dirt has washed off .
Take the rabbits' feet and put them in a container (does not need to be much larger than what is needed to fit the feet) of either 70% or 90% Isopropyl Alcohol. This alcohol is also known as Rubbing Alcohol which you can get cheap at any local pharmacy. Leave the feet in this container for a minimum of 48 hours (there is no maximum, the longer the better, but any more than 3 or so days is probably unnecessary).
Once the soaking time for your feet in alcohol is completed, prepare a saturated Borax solution in a container of similar size. Do this by dissolving Borax powder into warm water while stirring until no more Borax dissolves, but rather gathers at the bottom of the water in the container. 20 Mule Borax is an old powder laundry detergent that you should be able to find at any big retailer like Wal-Mart or Target. Take the feet out of the alcohol, squeeze them lightly in a sink or outside just to get any excess alcohol out of them.
Next, place the feet into the Borax solution and stir briefly. Let the feet sit again for a minimum of 48 hours in the Borax solution. Once again, you can leave it for as long as you need in this solution, but more than 3 or 4 days is likely unnecessary. Once you are done soaking, take the feet out of the solution. Wash them briefly in the sink to wash off any attached Borax crystals on the fur.
Dry the outside of the feet using a paper towel just until the fur feels dry and fluffed. Leave the feet out anywhere you wish (preferably inside) and they will dry to completion. You can tel if they are completely dry by trying to bend the joint that connects their lower leg (calf) to their foot. If it does not bend, all of the muscle inside has dried and the foot is 100% preserved and safe to be handled.
How it works:
The Alcohol works very fast and displaces all of the actual water (H2O) that is inside the feet. It works very fast due to its volatile nature. Once you take the feet out of the alcohol bath, they now are fully moisturized with Alcohol rather than water. At this point, you could technically leave them out to dry and they would be preserved, though they would still be susceptible to long-term bacterial growth when dry.
Instead, to seal the deal, you bath the feet in Borax solution. Because the Alcohol is still just as volatile, it is displaced by the Borax solution just as fast as it displaces the water. Now the feet are fully moisturized by a Borax solution. Borax is a anti-bacterial chemical that will inhibit growth of bacteria in the feet. As the Borax-saturated feet dry, the solution leaves microscopic Borax crystals inside the muscle and tissue of the feet, making them 100% preserved from bacterial growth or rot.