We run hounds all year long and they always go in te dog box. Hard sided box with vent holes that can be open in the summer and closed in the winter ratchet strapped in so it doesn't slide around and it is great. Can easily take 6 hounds or just 1 and they are light enough that my wife can put it in and out with no problem. We just put some woo shavings or straw in the bottom. Had the SPCA stop us one day and said that our hounds looked comfy and warm in there