Fatboy, my dwarf Himalayan, got so blocked up he almost died. He doesn't seem to have the puking mechanism my other longhairs have. Four miserable days at the vet's getting enemas didn't cure him, and the "stomach irritant" pills I was to give him thrice daily were ruining both our lives. I got a large ear syringe and began giving him a full shot of my own piss once a day and his whole system straightened out and returned to normal within a week. Whenever I feel inclined to flush my own colon I use as big a batch of fresh urine as I can muster. It is gentle, sterile, and a natural lubricant.