I was sold 10 quail at 2.5 months old, supposedly 1 roo and 9 hens. One roo crows and shows foam and rusty breast, so definitly male. In observing the quail, I have noticed that 6 have spotted chests, so I guess females. 3 quail are mobbed by the cock, one of them has lost most head feathers and is very skittish indeed, these three stay in another part of the cage that is like a box, and don't come out much, they flee there when the cock bullies them. Now I noticed that these 3 all have the same colouring as the cock. I tried to sex them, they don't produce foam and don't seem to have the nipple in the anus that the cock has. Could it be that they are younger? Or could they be hens after all? I do find an egg in their hiding place from time to time. I got them a week ago and they have been laying 3 - 5 eggs/day.