Ratproof feeders start at $65.00 for the small ones, there is a guillotine style like the Grandpa feeder that is $39.00, galvanized steel, not aluminum like the Chinese ones that are available. Rats can chew through aluminum but in those things the rats just lifted the lid and ate their fill.
You can poison, trap, flood and block the tunnels, and when you have them all killed out or if you kill them all is more likely, a new population will come right in behind them.
One thing works, control the feed with a treadle feeder and you are done with rodents and wild birds. A long term solution, plus you save enough money stopping feed theft and waste to pay for the feeder within a year or less.
Be sure your bulk feed is in a metal barrel of some type and clear up as much debris as possible so the rodents have no place to hide. Rodents tend to have their burrows or dens within a few dozen yards of their food source so the predators don't get them traveling back and forth. Clean up anything that provides cover and concealment.
You can poison, trap, flood and block the tunnels, and when you have them all killed out or if you kill them all is more likely, a new population will come right in behind them.
One thing works, control the feed with a treadle feeder and you are done with rodents and wild birds. A long term solution, plus you save enough money stopping feed theft and waste to pay for the feeder within a year or less.
Be sure your bulk feed is in a metal barrel of some type and clear up as much debris as possible so the rodents have no place to hide. Rodents tend to have their burrows or dens within a few dozen yards of their food source so the predators don't get them traveling back and forth. Clean up anything that provides cover and concealment.