A pair of ducks can roam about an acre and devour almost all the slugs. Pekin, Ancona, Welsh Harlequin, Rouen, Indian Runner, and Muscovey are all good choices with the Ancona being the most energetic and hungry IMO. The largeer breeds like Pekin, Rouen & Muscovy make great dual purpose birds but tend to be lazier than Runners and Anconas. The large breeds will get the banana slugs the smaller ones cant handle. Â
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Other benefits are the eggs they lay, they're way better than chix eggs, especially the Welsh Harlequin, plus they make fertalizer all day long. After you butcher them the feathers can be added to the compost pile.Â
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Some drawbacks are the noise, except the muscovy is almost silent, they shit everywhere, they eat all the beneficial bugs and frogs. They can put a whoopin on lizzards and snakes too but probly wont eat them unles theyre starving.Â