Can you determine sex but vent size if the hens are laying? I know it's easy to tell with other poultry if you look at vents. I don't know the official names of color but I have one grey one with a rust chest and a bib, no doubt a male. I have a white one and an all grey one. The male has a small, roundish vent. The two others have bigger smiley face vents, which look like egg laying chicken vents (but on a smaller scale). I have gotten a few eggs, but only one at a time. I am new to button quail.