When Betty and Billy rescued Walter from the pound, they never imagined that such a cute dog was capable of such unpleasant and frequent smells -- Walter passes gas constantly! But just when the dog seems destined to be returned to the pound, a remarkable event turns him into a hero, and his new family learns to live with his smells.
I have been a huge Kotzwinkle fan for a very long time and am pleased to see he is using his awesome powers for good. Jack in the Box, sadly out of print, is my favorite of his adult profane novels.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.