Nice!!...good job!...I'm building a pen also but I don't like the way ur house is inside the pen...I like the dog house/whelping pen sticcing out so I can have access to the dog/pups from the bacc...I like two doors, one in the front like u have it and one in the bacc of the dog house/whelping pen!...makes it real easy to access the dog/pups this way!....overall that's a helluva job!!....how long did it take u to build it??