The micro organisms from burial were able to clean up the area between the bone and the horn so that the horn came off the bone like they use to do to make powder horns. The other one my girlfriend came over and cleaned for me. I have skinned goats but never did a head. I couldn't bring myself to scoop out the eyes so Carole came over and we started a fire in the fire-pit, put in the pit a large kettle and sat around cooking the head. She skinned it first, scooped out the eyes and we boiled it. Every now and then she'd lift it out of the pot and cut off more flesh.
We spent the afternoon laughing ourselves silly and hoping no one pulled into the drive way or they would think we were into some kind of devil ritual..
Cleaning a skull with boiling doesn't allow the horns to be removed from the skull. There is no way to get between the bone and the horn...
The bucks skull I got 68 dollars for on ebay and the doe with the removable horns brought in 32 dollars. I also had a coon skull that went for 3 dollars....
Now I am old and have to wait for something to die on my property. Hopefully never a human...