When I first jumped into this thread, it was to tell all about an overweight, and diabetic (pill) of a cat. Jesabelle was on the verge of being euthanised as she was deficating, and urinating all over the house. I cat sit for her slave Anne, and also clean her place. After watching this grossly over weight cat try to stoop in a tiny litterbox, I changed things around. Anne is quite quirky in that she would put litter pans into larger storage boxes. I one day dumped the litter from the tiny pan into the storage box, and the problem was solved. Anne got Jesabelle some cosequin, and Jesabelle gets around much better now! It does seem to help animals.