Birds can eat Birds meh?

Something I saw as a teen disturbed me, outside of a KFC, I saw a bunch of pigeons fervently eating the leftover chicken and they looked off - some had only one foot or multiple feet, some had lumps, etc. I made this piece because I want to people ask the question, " Where does our waste go and how does it affect what's around us? Is it really okay? Like do we really want birds to be eating birds?"