Our 7lb chiwawa (sic) was almost completely stopped up. I rubbed a substantial amount of DMSO on his prostate area and winky. In about 8 hours he popped out a white mass that looked like a worm but apparently was softened stones blocking his urethra and peed a potty paper full. That was about 2 months ago. It is happening again now, and I have once again applied the DMSO, and he is getting some relief but it has been about 12 hours. Gonna try some ACV now to finish the job and reapply the DMSO.