Yes, turtles do fart, and their farts smell incredibly bad, as do the farts of snakes. In fact, it is my opinion, based on personal experience with reptiles and not on any formal research, that many reptiles use farts as a weapon.
Reptile farts smell so bad that sometimes you can tell that one is nearby in the woods, even on a windy day, before you can see the animal. One day I was hiking through the woods in Arkansas with a friend and I told my friend, "I smell a snake fart." A second later, the snake crawled across the path. Astounding but true!
