I am getting ready to buy our new chicks their "grown up" feeders and waterers. We have 5 chicks and may add 2 more in a year or two. I want plastic waterers as I will periodically use ACV and it'll rust the metal ones. The feeder however, is a different story. I want to be able to clean it well so there is no left over powder residue to get moldy. I also wish to get one that will help prevent them from scratching out much feed (to prevent rodents). I rather spend a few more dollars to get what will be best for my situation. Any thoughts??