[Flyer]

The side doors are awkward to use. I think if I worked on a ramp better than the temporary one I tried, he could learn. In the mean time I don't mind lugging the big lug once in a while.

[AnAmericanMother]

I used 1/2" plywood - it's heavy but the extra stiffness is worth it. I cut two pieces a little more than 12" wide and each 4' long. I installed two heavy strap hinges to join the two pieces together, with two blocks of 1x2 screwed to the back of the joint so the ramp couldn't flex through the join. I made cleats from sections of 1x2 and screwed them to the board about one puppy stride apart.

Painted the whole thing grey to match the interior of the Expedition. It worked very well until she was big enough to jump into the back (and her long bones had closed).