Here. Al is on BYC and has been helpful to many of us in setting up his feeders, training the chickens etc.
I won’t link him here but you can message him. He is Al Gerhart (that is his BYC user name and I believe also his real name).
https://ratproofchickenfeeder.com/Medium-Ratproof-Chicken-Feeder_p_1.html
