I forgot how big a goose can get, thank you for the pictures, nice chickens too.We have a batch of chickens of similar breeds. We have 11 hens in that group and we are getting between 8-12 eggs/day. But we are in Northern California in the Santa Cruz Mountains. It drops into the high 30’s 40’s at some night. But is high 50’s to low 70’s during the day. Your girls need 8-12 hours of daylight. So if it’s overcast with you that will also affect their laying. We have lights in their run and coops. We have two large coops with heating panels. We have 25 birds total. Twenty chickens, 4 ducks and one large Embden goose named Tony. Our coops are also fully insulated, and have insulated vinyl windows. When I built them I wanted to be able to walk in them without being hunched over. Everything else followed from there.
Our neighbors have chickens but they don’t get the volume of eggs we get. They’re still getting eggs this winter. Their birds are I think 4 months older. But their run and coop are different. Not insulated and I didn’t not think they do the same with lighting as we do. Hope this helps.