It's sad that I know this, but no.

Years ago, I buried one of my guinea pigs that had died. I dug the hole really fucking deep, but each night our lawn was getting brutalised by foxes or whatever tried to dig holes in the night. One night I looked out, and saw multiple animals digging at the hole.

I mentioned this to someone at my gym, and one person chimed in to say that they worked in forensics. Apparently lots of dead bodies are dug up either partly or fully by animals that can smell the body, so much of what they had to work with was tainted by animal markings. The animals might not smell below the ground, but you probably dug the hole with the body nearby...

TLDR: Animals don't give a heck about the law.