Identificaciones de tfrench

Bones that were dissected from a Western Screech Owl pellet or multiple pellets (the pellets tend to break into pieces when they hit the concrete). Found 2 mandibles and one part of the skull with teeth. Unfortunately, did not find the rest of the skull. Photo 3 shows a tooth that popped out when I was cleaning the jaw. I’m curious what photo 4 shows.

From this owl:
https://www.inaturalist.org/observations/190650369

We saw this canine at the side of Carroll Ave. It looked like a skinny coyote or fox. However, it was very playful, seeming to be trying to catch a fly as it friskily jumping through the grass. Very short light colored fur and ribs showing. Not sure exactly what it is.