Cathy and I were out in the back yard and we heard a scratching noise. We’re used to quite a bit of noise from birds and occasional tree frogs, but this was quite different and we didn’t recognize it. We finally noticed this squirrel on the cow skull that’s hanging on our back fence. The squirrel, in typical rodent fashion, was gnawing on the top of the skull. I assume it’s gnawing on the bone to get calcium and other nutrients. Anyway, it’s one of the reasons you only find relatively fresh bones in the wild. They don’t last long unless they get buried (and probably even then).