I set up a Quack-a-phonics system last fall, had it in operation for about a month and then the guineas found out were the goodies were coming from!! As I have 5 ducks that supply more than enough poo I pump the water out of their 'pond' into the 'system' which consist of 6 half totes (The water line is at 12"). While I used only 3 of the 6 I'll bring the others online in the spring. So far it looks as though it will be a good supplement to their free ranging. With 30 birds total I'm anxious to see how many less pellets they eat. Before that can happen I'll need to cover the sprouts, I'm thinking using some old storm windows I have on site, build a frame, everyone knows the drill.