depending on the food it eats where the pellet was found u can look in an owl pellet guide
to find out what the owl has eaten
The A hole
The owl pellet remans in the owls rectum until the owl decides it would be a good time to puke it out.
The outside of an owl pellet is covered in a thin slime, to assist the owl with ejecting the pellet, the undigested fur or feather tends to be the next layer, with the undigested bones on the inside.
The owl pellet shows what the owl has eaten.
pellet
The inside of an owl pellet contains the remains of bones and fur that was undigested.
Fur and bones of what the owl ate.
the size and shape
One important thing you can learn from studying an owl pellet is learning what animal the bones in the owl pellet belong to.
The owl pellet remans in the owls rectum until the owl decides it would be a good time to puke it out.