You seem to not understand the cycle of life or the food chain, which we're all part of. 

Begrudging an animal for consuming meat is an extremely immature response to death. Native Americans and other cultures place their dead on structures that allow for this process. The process of embalming and then placing  corpses in hermetically-sealed boxes to preserve them indefinitely is a manifestation of the ego of "civilized" people that separates us from the world we live and die in, as well as a subconscious attempt to hang on to what we should let go of.

Leave me in a field to be torn apart by critters, or wrapped in a shroud in a shallow, unmarked grave to be consumed by worms. I won't care, having moved on. The idea that you can keep from returning to the earth is insane.