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Be careful with ceramics. If it isn't CLEARLY STATED, all ceramics have lead in them which is deadly for lead poisoning. You don't see it right away - heavy metal is a build-up killer. Even our crock pot liners are still being made with lead.
http://www.foodsafetynews.com/2011/04/several-months-ago-gerald-omalley/#.U3IOayhWg_c
http://www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=1&ContentID=1135
http://insightfulnana.com/home-garden/housekeeping-home-garden/lead-poisoning-and-crock-pots
I had thought early in the game that the ceramic was a good choice but you just can't get it used. Purchase only if it clearly states NO LEAD and NO CADMIUM.
I actually purchased a set of the little lead tests. You can get them in paint departments. I had an old bench I was going to use in the chicken yard that tested positive for lead in the paint that was on it.... didn't put it in the yard.
Also - with fermented feed you should NEVER use galvanized metal feeders. They contain zinc which will also be leached into the feed due to the high acid content. Same goes for the galvanized metal waterers if you use any ACV in your water. Zinc cal also cause heavy metal poisoning.
Here's an article regarding chickens that only touches on it a little: Lead and Zinc The Hidden Dangers
I used to use the flat stainless steel puppy pans for the chicks which are great BUT too lightweight and tip right over like you are saying. I finally decided to try to convert everything I possibly can to glass and reserve the plastic for situations when I don't have a better solution.
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