How do you know how big to build a dog house? I know that you don't want it too big or too small and that it depends on the size of the dog - but the dog is a pup. He's lab / dalmatian mix (11 weeks old - cute!) so I'm thinking he'll grow to be about the size of the average dalmation or lab. I'm thinking of building a dog house that is about 27" x 35" (inside) but I'm a little worried that might be too big for this dog. Anybody have any experience or knowledge that might help me?