“they also regurgitate pellets of hair and bone the same way owls and raptors do”
No they don’t.
The closest thing to that is some egg eating snakes, who use specialized muscles in their throats to crush eggs, and spit out the shells.
And Western Garter Snakes. I caught a three foot W. Garter when I was about 14 and it regurgitated the hair and bones of a mouse in its cage. 3 ft. is huge for a garter snake. Insects are their usual diet.