What kind of bug likes to eat clarinets clothes and cat food?

I have found tiny, furry, brown bugs in my clarinet case after a few months of not touching it. When a piece of cat food gets onto the floor these same bugs are found on them. And now I have gone through my winter clothes and found about 5 of these things on my sweater!!!! What are they and how can I get rid of them. I would be able to identify them in a picture.