This is exactly what I had in mind. The pajama bottoms consists of one pattern piece and went together quickly. The great part is that Miss Harper can wear them for warmth once Halloween is over. I found that using multiple rows of elastic results in a more comfortable fit around the waist.
I purchased this bootie pattern for the bear feet, but they will have to wait for another day. I may go into a bootie rampage later and donate them to charity. For now, this appears to be a perfect solution for the bear feet. The bottoms will be pink and the rest purple.
The final piece of the costume is the multiple point collar. One for Harper and one for her dog.