I have two muscovy gals, and i'm not sure which one actually laid the eggs, because they take turns sitting on the eggs. All The eggs were infertile so we took daffie off the nest but then donals went and sat on the eggs. Any way that is beside the point, she had developed a squeak, she has never had a squeak before and she usually makes no noice, either does her friend. Is she ok, what could it be?