Yellow and Black striped worm type bugs eating my cats spilled dry food?

I live in a carpeted apartment with my Dad and my Cat. Today I was bending to pick up some kibble(my cats dry food) from the carpeted floor, when I saw a yellow and black striped worm looking thing about the width of your pinky nail attached to the kibble like sucking on it ewww just thinking about it makes me sick. What could this have been? There were 3 of them I think.