I have all three - Bergan Stack 'N Store. good old metal trashcans and conventional feed bins by Behlen County. When most of the horses are eating the same feeds, these are definitely the winner, hands down. They can be easily divided into two compartments (and a handy person could divide one into 4 or more compartments - or just open the feed bags and stand them up inside the bin). 17 years and never a rodent/raccoon problem (haven’t chewed through it, can’t open lid). They still look brand new and the hinges have held up too.
I use my Bergan bins for PDZ stall freshener, horse treats and other items (I have the medium sized ones, not the huge ones). They have been very durable, rodent proof and easy to wash/clean. They stack well and come with different color doors so if you’re a color-coordinating nut like me, you can find a color that works.
I use the metal trash cans outdoors for keeping compressed alfalfa hay in. Keeps it dry and fresh, right next to the pasture for ease of use (this is just in late fall/winter).
