He obviously can and will eat the feed, the better question is should he? An all flock type feed with calcium/oyster shells on the side might be a workable solution, but what you need to decide is what works logistically for you and your flock. Over time a high calcium diet can cause kidney and joint issues in nonlaying birds (can not will) but we are talking years here, if you plan on switching out your roosters every year or two, it probably won’t be an issue. Also how much of a pain will it be to provide an alternative (as above) versus an all in one feed? I feed my quail a layer feed at all stages, including chicks and males, but lifespan is a year, pre laying interval is 7 weeks, protein is high enough for both chicks and adults, keeping one feed around works for me and my birds, but you need to figure out what works for yours.