So as a little background. I've recently been given 2 4 week old button quail by a regular to the pet store I work at. I've had them for 3~ weeks now and have noticed breeding behavior. I'm currently feeding them 24% protein crumbles, and have begun giving them bird gravel with oyster shells and charcoal on a recommendation from a coworker who also keeps them. I was wondering if anyone has experience here, should I keep the gravel in a separate container to their food, or should I mix the two together. Any other tips on keeping buttons would be much appreciated too. Attached is a picture of the two in the 20 gallon breeder I have since moved them out of.