Folks, this problem was solved years ago, then I came along and made it more affordable. Treadle feeders with spring loaded doors and a counterweight are going to keep mice and rats out if they are installed properly and maintained. The only caveat is if you are already overrun with rats but even then the rats will smother themselves in the feeders in a few days.
Gaps, yes, but read the reviews on our shopping cart or just around the web where people have done reviews. Mice can get inside a nickle sized hole but not a 1/4" galvanized sheet metal gap. If it does it gets trapped and can be disposed of easily enough.
Read the reviews carefully though, even the Grandpa type feeder won't always stop rats and some feeders leak, if you see 20% or 30% negative reviews, run Forest run.
Gaps, yes, but read the reviews on our shopping cart or just around the web where people have done reviews. Mice can get inside a nickle sized hole but not a 1/4" galvanized sheet metal gap. If it does it gets trapped and can be disposed of easily enough.
Read the reviews carefully though, even the Grandpa type feeder won't always stop rats and some feeders leak, if you see 20% or 30% negative reviews, run Forest run.