I store mine in plastic as well. No issues, and we DO have mice in the barn. Visually saw a rooster catch and kill one, and also found one in the feed when I forgot to put the lid onI never thought about mice or rats chewing through the plastic buckets. :/ They are really thick polypropylene plastic. I know plastic because I work in QC in plastics. I guess it's possible though. I've been lucky in using these plastic buckets for a year now with no problems yet. Hope that doesn't change. I thought about going with metal but over time even that can rust.



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