I thank every one for all their advise. Oliver has his appointment to be neutered next Weds as well as a full fecal exam and x-ray of his paws. He hasn't pooed on the rug now for several days and I still have my barn cat inside also sharing the two litter boxes--- See it is so sporatic that we are very confused. Oh and I am trying to scoop more often. Sometimes checking 3 times a day just to try to prevent another accident. Oliver was de-wormed in December for tapes and other parasites but never thought of an infection. I hope the vet can diagnose and treat him and get rid of his awful mushy and smelly poos. Could that also explain his bad breath? For such a young cat, I am so surprised that his breath is so awful. I've checked his teeth and they are nice and pearly white and he eats only dry food. I just never thought to tell the vet about his breath, or mushy, smelly stools.