
My OH made our whelping box, because of my large breed it measured something like 1.7m x 1.5m! he made it out of some waterproof sheets of wood and we did have broom handles ready for the rails.
I did ask him to make it so that it could fold down after we had used and be put away neatly, but he sort of forgot and so now all the bits have been numbered so that when we come to 'erect' it again we know which bit is which! :D
I wouldn't mind buying one though,,,,,,,,,,,,,