Just salt em...
Take them out of the freezer and put them in a plastic container covering them completely with salt. Sometimes, if I am going to be using them for a specific project and need a certain pose for the claws/toes/talons (for gripping a crystal, using them for jewellery or wands or handles), I fit them internally with a wire frame, while the flesh is still soft and then pose to my liking. (That is to say that I insert galvanized steel wire from the joint of the foot (depending on how high up they are cut) along the bones and into the toes of the foot until they rest in the pads of the last segment of toe. You can then shape them around any object you wish to.

Salt is both a dehydrator (leaching blood and fluids out of the skin and flesh), and a disinfectant, prohibiting the growth and spread of bacteria, conveniantly eliminating odours. Salt also changes the ph balance of the skin and flesh so it becomes less appetizing to critters and bacterias.
Make sure that the feet are completely covered so that they dry evenly.
I use coarse sea salt, or kiln dried salt (which is a bit harder to come by. but you can dry it in your oven on a cookie sheet). I check them after 48 hours and then dump the salt into another container and sift it, because it clumps up with moisture. You can dry it a bit in the oven at this point to use it again, but it's not necessary unless you live in a very wet climate, where the salt will naturally clump a bit.
you can probably do this whole process in your garage if you don't have dogs or cats around that could get to it. It shouldn't attract rodents or other animals once it has been salt for about 24 hours.

Once you have dried them sufficiently, when they are not the least bit flexible or fragrant ;), you can coat them with a clear liquid glue or plastic coating depending on your preferences. Have fun, and I hope that my information with help you out in the way that you need....

blessed be
kaija marie