Any suggestions to decrease pain in senior cat with arthritis of lumbar spine when back is arched in litter box to have bowel movements? Litter box has very low sides and the cries of pain occur when she arches her back not when jumping in or out of litter box. She is on twice daily stool softener and pumpkin added to wet food to prevent constipation and need to strain. She is on pain medication and a n-said for cats but still has pain in litter box with back arched. What has worked for others that helps decrease a cat's arthritic pain of the lumbar spine?