They specialize in being able to accommodate about eight rats inside.
If I had rats that would show themselves, I'd be picking 'em off with my 40 caliber blow gun, but it does take a little practice to get good with.
There's always a Rat Terrier!
Lets you at least block it off when there's food inside and the ducks aren't eating.
I have a live trap for rats called a Ratinator.
Might be time to do something about your rat population.
Not sure what would work if the rats are that bold.
I built some PVC feeders that would work fine for wet food. It was funny because I was describing what I wanted to do to the guy in the plumbing section and he said that he sold more parts to people building bird feeders than he did plumbers! 😆...