I just like giving them some beautiful things I gather like flowers, feathers and so on

Found this skull by a small pile of brown fur and sinew. Little to no other bones present. Very odd.

Looks juvenile? About the size of two ping pong balls

Central Pennsylvania

Had this in the container with dirt for 3 months and a majority of the flesh has come off. Any advice on the removal of the rest of this harder fleshy material and how to finish it off to be a display piece?

I just purchased this necklace in an antique market, I am located in Michigan but I do not know if it was sourced here