If the crate is too big, your dog will simply do his business in the corner and move to the other side of the crate. (blog.pawedin.com)
By covering three sides of the crate with sheets of card, or with a blanket, you create a little cave for your cat in which she can feel sheltered and protected. (best-cat-art.com)
On the dining room side of the crate sits a vintage bug I found a few months ago at a yard sale. (cassiebustamante.com)