(sorry my sevices temporaly off)
I'll only take 1 dog at a time since I already have 3 little ones of my own. Your Pet will be kept inside most of the time but I keep my door open so they could go out as they please. I have a grassy area, wood chip area, and cement. Mine usually like the sunny woodchip area. It's all very secure, since I went blocking all the cracks because my dogs are small ...