I've been using galvanized aluminum window boxes for waterers, and they've worked out pretty well until now. They have started to rust on the inside and it is getting into the water. I had been cleaning it quite often, so got plastic inserts, and now have solved my rusty water problem. But I wanted to know if it has harmed my egg layers in any way. The rusty water, I mean. I have 14 hens and only about 7 or 8 of them are laying. Most of them are just turning 3 years old now. I've lost a few, and have no idea how they passed! It always happened overnight. Hope it wasn't from the water!!!