Raccoons have chewed holes in our rubbermaid garbage cans holding cat/dog food in our garage, so we opted for the 20 and 30 gallon metal trash cans in our locked coop. Oh by the way, we keep a 10 gallon metal can with a locking lid on our front porch to contain our cat food, and 2 weeks ago a raccoon got into that one, so it is now in the house.