I’m doing something similar to R2Elk with feed and water in the coop and herding with sticks. I rarely need to herd them in anymore at one year old, they almost always go in on their own, though later than I’d prefer... For me, treats in the coop turned out to be a bad idea, as it was encouraging the more dominant ones to chase off the lower ranking members at roosting time, so the lowest ranking guineas would just sit outside the coop waiting, and then it would get too dark for them to be comfortable going in. I also used to use a triangle bell to signal to them that they were getting treats in the coop. That also was problematic as they started getting so excited that they would just run around and around the coop (they need their brains engaged to use the ill advised tunnel and door that allow them access to the coop.) What I do now is whistle for them in an area near the coop but a little bit away from the tunnel entrance. They know that means food, dried mealworms, soldier fly larvae, or millet. I sprinkle it around multiple locations so everyone gets a little bit, even if the bullies try to chase them off. When they finish, they usually mosey on over to the tunnel and coop door, eat a little bit of the feed that’s always available, and roost for the night. If they get hung up somewhere, like calling from the roof of the coop, then I direct them down and into bed.
