Quote Originally Posted by Elkaholic View Post
Do not make it 4 foot tall, it only needs to be a bit taller than your dogs so they can stand up straight. I have a 4 foot by 4 foot box that is roughly 26-28 inches tall, cant say for sure as I am not near the box. It has 3-4 holes on each side, the two sides are divided which comes in handy when you need to keeps dogs separate. I have hole covers that I can slide over the hole to keep them warmer in there if need be. As others have said make sure you box is NOT air tight and can breath. The only time I have heard of dogs dying in boxes is aluminum boxes with little to no ventilation. I can get you some pics of mine later on and email them if you would like.
Sent you a .PM