We wanted to start breeding our own rats to save us money on feeders so we build a small 3 tower rat rack with 5 bins in each tower. We used 3 melamine shelving board (cut in half) for the legs, 12 2" X 2" with 1/2" hardware cloth all from Home Depot. (not all the wood are in the pictures, lol)
We had made them with 4 bins but then installed a 5th bin at the bottom.
Wanted to share the rat rack with you guys, enjoy. We are also going to be building a mice rack in the next month or so.