How Small of a Hole that Rat can Fit Through?
Rats can squeeze through surprisingly small holes, often as tiny as 1/2 inch (about 1.25 cm) in diameter—roughly the size of a nickel. They can do this because their bodies are incredibly flexible and their skulls can compress to fit through narrow spaces. Additionally, young rats can fit through even smaller gaps, so any tiny opening in walls, floors, or foundations could provide an entry point for them.
