We, unfortunately, had to rehome our remaining three chickens because they weren't getting what they needed. We spoke with the woman taking them(they will stay pets, never killed), and seemed like a know it all but she meant well. I say this because she said Pilgrim geese are the only geese that are distinguishable by looks, yet goes off judging what Matilda is, saying she's a Canadian goose just because my pictures made her look grey in color(she's beige and dark brown), and that Africans and Brown Chinese are hatched out with a distinguishable knob, which is a complete lie. So, this being the case, I very much question the advise she gave me. She said that geese, as they reach adulthood, have a need to be in the water frequently and the water must build up algae and bacteria after several uses and needs to be changed once a month. She says the bacteria and everything is healthy for them. Is this true? We all know geese poop VERY frequently and my concern is, besides the bacteria, is if it's safe for them to be drinking bacteria filled, algae ridden water full of their own poop... That seems, to me, unhealthy for them to be drinking water soiled with their own bodily waste. I have algae growing in a tub of water in the closet using an 'indoor sun', so to say(uvb+uva full spectrum lighting), I just need to know if she actually knew what she was talking about. I don't want my beloved goosey girl to get ill because of a know-it-all's bad advise. She is quite obviously not Canadian... Anyone that's seen a Canadian could probably tell you this.