For me, it's not a matter of burying my head in the sand. It's just not something I find morally or religiously objectionable.

Dead animals represent a potential protien source for living animals. In the wild, animals eat each other with no compunction, which leads me to believe that God created them such that they need meat to be healthy. Domestic animals really don't have that opportunity, and while yes, we can go to extrordinary lengths to create protien-filled foods for them without resorting to having deceased animals being part of that equation, if in fact protien sources are readily available via animal carcasses that must be disposed of, anyway, so be it.

If we bury the carcasses, or if we creamate them, or if we feed them to other animals, in the end, every cell is going to break down into carbon, oxygen, calcium, etc.