And if you're making one dog bed, you might as well make two at once, right? My MIL expressed interest in a dog bed, so I'm making one for her as a Christmas present. She doesn't know about it, so it'll still be a surprise at Christmas. ;) I just didn't have time to get it done before her birthday. At any rate, I don't plan on making any more, so I made sure to take a few pictures along the way.
The SUV bed is needs to be much wider than the foam, and because of my foam-saving cutting layout, the small dog bed also needed some extra width. When adding the width, I simply lined the two pieces up and whipstitched them together. This is two-inch thick foam, so I whipstitched on both sides of the foam, so that I'd only have to go through half the thickness on each side. I figured that would stand up better to stress. Hopefully you can see that in the picture here.
For the smaller dog bed, I simply used the single layer, as his crate is shorter, and I didn't want him to hit his head when he stood up in the crate. But for Zoe's bed, I once again wanted it four inches thick. So I laid two layers on top of each other (with the patched ends at opposite sides) and then once again used a soft sculpture needle to stitch the two layers together in three columns. Those layers are not going to shift!
No pictures, but I then wrapped each mattress in a couple of layers of poly batting and stitched it down on all sides, before inserting the mattress into a permanent muslin cover. I've also made the waterproof, removable cover from PUL and a separating zipper (I bought these zippers at Cleaners Supply and was very pleased with price, selection, and fast shipping - NAYY). Today I need to make at least one outer cover for each mattress.