First of all, it is first-person POV, while I might use a third-person POV. This doesn't mean I don't appreciate you taking your time, but it's an important note to remember. I can kinda understand how to make a character disgusted. But it's not the same to make readers disgusted since I can't control readers, while characters that I write are my own. I can change them however I want. Anyway, I didn't find anything disgusting with your example, nor does it helps me.
Moreover, you used a disgusting thing, rotting away from an open wound on its leg. This is an easy way, and no offence, but I can do it myself. What I don't know how to do, is how to make a normal meal feel disgusting? Without mentioning rotten stuff, excrements, cannibalism, and other similar stuff, without making a person disgusting both appearence and personality-wise. How to write it?