I dont hear the buckwheat either, and it is hard to tll one bird from the other. My kids call them the car alarm squad. I have 12, and some think they are chickens, the other day they flew onto the porch roof. and stood up there "calling" for the chickens to come up. After the chickens couldn't join them they flew back to the ground. Mine all travel in a group with 10 chicks 3 months old. I didn't read the book about not letting them loose, and set them free when I did the chicks 3-4 weeks. They all stayed so far. The guinneas are always the first ones back to the coop, my only problem is they prefer to roost in the rafters, now the older chickens have abandoned the roost for the rafters also. Which is a subjust for the behavior section here.