Trash cans these days tend to be rubber or plastic, so it’s no challenge to a rat. Rats can chew through pretty much anything short of concrete and solid metal,

Trash cans these days tend to be rubber or plastic, so it’s no challenge to a rat. Rats can chew through pretty much anything short of concrete and solid metal, with teeth which grow continuously. They need to chew, to file their teeth, so chewing is a major exploratory activity for the little guys.