We don't make custom designs, but there are lots of ways to customize our pens.
You can add a Universal Kit to create either a bump-out (a separate 2 ft x 2 ft space), or an expansion, which makes an existing pen one size larger.  Our pens come in two heights - 27" and 36".
Please find below an images of all the different ways you can configure the small, medium, and large sizes by adding a Universal Kit to create a bump out section.