Our birds free range during the summer but WILL NOT go out in the snow. The coop has a course sandy gravel floor but its starting to get pretty deep with shavings so they will soon have a hard time getting down to it. I do have a couple of gallons of old aquarium gravel sitting in the basement. Can I just use it? Most is natural (white quartz) but it has a bit of blue and black mixed with it.....
