Recently mated females will also extrude a small amount of foam. It doesn’t mean they have any male parts or that there’s anything wrong with them.I had a "transgender" quail. Had all the typical physical markings of a female coturnix, but didn't lay eggs. So I did the pinch test and it had unmistakable white foam coming out. Yet it never made crowing sounds. Then the day came I decided to cull the boys... well, when I opened it up, it had an egg ready to lay and two more forming inside. The weirdest quail I ever had.