These interlocking grids with 3/4 inch square openings, are useful to use in kennels that house the smaller dog breeds. Not strong enough for really heavy weight dogs, they do just fine for the small to medium sized dogs.
They can also be used to place in whelping pens, though I would suggest if you do that . . . → Read More: Kennel Flooring 2ft x 4ft Sections Set of 2