I'm trying to figure out the best design for my quail cages and I am leaning towards stacked cages with automatic watering done with the little poultry cup style. It seems like the water would freeze in the cup and also the small tubes supplying the cups will freeze. I'm planning on having the cages inside my pole barn so they will be completely protected from wind and snow but the pole barn is not heated at all and the winters can get quite cold here in Michigan. Any tips to prevent freezing? Thank you!