cat hunter, that should be more than big enough for a single dog. Here, we build much smaller boxes, to help conserve body heat. I'll pu up a couple of links for you to look at. Maybe they'll help you, but, I don't know.
Good luck with what you do.
http://leerburg.com/doghouse.htm This has various sizes by breeds- shoulder height.
http://leerburg.com/...up.htm#doghouse on this link, scroll down to the "best cold weather dog house" part. These are the boxes I built. I think if you don't have as much cold to worry about. You could build on this size, just leave out the devider. Shoul