I'm not sure you can see this as well in these pictures as I can in real life, but here is Darby, whose rear end is snuggled as far as she can get it into this too-small dog bed.
She actually wiggled around for awhile until more of her was tucked under the rim of the bed.
Now here's Pumpkin perched on top of the little bed.
I noticed another difference in these two photos -- the quality of the light. Darby's photo shows the morning light on the north side of the house filtered by shutters; Pumpkin's photo was taken by the light of the lamp on the shelf behind her.
Differences. I like them.