We have a cat that was briefly feral, and she will gorge anything she can get to. While we were visiting my family for the holidays, our cat sitter friend called us and let us know that she had left the bin full of dry food on the counter, and the cat climbed up, pushed it off the counter bursting it open, and gorged on a ton of food, so much that she thought the cat was having trouble breathing. She was OK though, I think at some point she vomited up some of it.

We definitely can't leave any extra food out with this one around, likewise she will try to get to people food if human backs are turned. She's calmed down a bit though, it no longer seems that she's constantly plotting how to get extra food.