Why is hard to make a whole skeleton from an owl pellet?

Making a whole skeleton from an owl pellet is challenging because the pellet contains only the indigestible parts of the prey, primarily bones, fur, and feathers, which can be fragmented and mixed together. As owls digest their food, they break down soft tissues and may crush bones, leading to incomplete or damaged remains. Additionally, the variety of prey types consumed by owls means that the bones found in a single pellet may not represent a single skeleton, making it difficult to reconstruct an entire organism accurately.