We only have three hens so we don't buy massive quantities of food. I buy a 50# bag and store it in the bag in a metal garbage can with the lid on it on a covered porch. I have another can with a bag each of BOSS and 3 grain scratch. Oh yeah, I live in South Florida so humidity is a bit of an issue. I just had to throw out 1/4 bag of BOSS and 1/3 bag of scratch because of moisture and mold. How can I keep the food storage dry?