I have 7-week-old Bobwhite chicks that I'm planning on moving from the brooder to their coop/flight pen either tomorrow or the day after. I saw some posts about them liking to take "dustbaths" in sandboxes, so I bought a few kitty litter pans and put them in the flight pen area. I haven't bought the sand yet, but before I do, is there any specific type of sand I should get for them? Or any specific type I should avoid? I was thinking about picking up a 60 pound bag of Quikrete Tube Sand from TSC to put in the kitty litter pans. Here's a link to it www.tractorsupply.com/post-installation-equipment-supplies/sand-mortar-cement/tubesand-sand-4737976 Would that work okay? Another store around here also has "Play Sand," which is a little more expensive, but if that would somehow be better for them I'll get that instead. Also, should they be fine with the sandboxes at 7 weeks old? I'm concerned they might eat it or something. Thanks!