I have 2 muscovies, both female, both have been laying for a while. About 10 days ago one of them started to lose feathers and as we are in August with 40 degrees centigrade dry heat I am thinking she is stressed, not moulting. She has also started to lay and then immediately eat her own eggs the last few days. They live with six chickens ( each species has their own house at night) and free range during the day over about 1000 square metres with our horse. Everything has been fine since last November up until 10 days ago. Any ideas?