How do I add my waterer to the coop page?
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Have you tried clicking the "adding a coop design" button?
It seems even ideas on coop related things are included there.
Go to the coops page and look at the popular tags - click on water feeder - and it gives a list of similar articles.
IMO that's the place to post your idea. But I don't know who assigns the tags - likely the moderators?
I would go ahead to the coops section and post it. You can consider posting under a member page instead and enter in the writing contest. Here's that link: post #1