Maybe in your shed but no way is a rat getting through the hole beside your back door. Lay traps and don't put food out for the birds.I saw a length of tail around 4 inch long. Whilst that hole isn't I've already had one rat death in my shed last year, blocked it with metal on bottom of door, have rat or rats on my bin area. Rat broke the new trap. We have kept the back door shut since last summer but he has been around