I want to get a goose as a watchdog for my chickens. I'm just wondering do they really need a pond or can they just have a open water-er? What conditions they can live? It in gets below 0 degrees in the winter they wouldn't be outside they would be in a insulated coop with a heat lamp. And over 100 in the summer. Is there any certain breed that would be okay in those conditions? Also i want a good layer. What kind of food they eat? They would be free range on lots of land. Coop size is not a problem.