having some difficulties telling our ducks sex by their sound... we are rather certain our two older ones are hens, because they were by themselves for a while and we know they both "Quack", rather loudly, at that, but after we added the younger three to the flock, it seems if one is making any noise, they all are, so it can be a little tough to tell who is making the quieter, wheezy sounds( which we can hear, just cant tell who is making them), and who is quacking... so I was wondering how much longer till the drakes get their curly feathers in(they are a little over 2 months right now)