Order a duck step with the treadle feeder if you have ducks. The feed piles up deep enough, don't think a cross beak would have any problems but I have never been asked that question. Anyone out there with experience on this?
An old freezer is a great idea. On occasion, metal barrels will form condensation unless you wrap them in some sort of insulation. On a freezer or fridge the insulation is built in.
One thing though, bringing in the feed bowls at night just teaches the rats to eat during the day. You really...