New January 2010!
Dr. Paula Henthorn is conducting research into Canine Cystinuria at the University of Pennsylvania. The Mastiff Club of America Cystinuria Committee has issued an update on that research that contains some extremely promising news about a genetic test and tantalizing information that might help us make better decisions about our affected dogs. Read the update here.

My Dog Has Cystinuria:
What Do I Do Now?
People usually search for information on cystinuria because their dog was diagnosed with cystine stones, or tested positive for cystine in the urine on a screening test at the University of Pennsylvania.

If your dog tested positive on the screening test, he may or may not go on to form stones. One study suggests that as few as 1 in 6 dogs with cystinuria form stones. However, our knowledge of this condition is not complete enough to state the risk with certainty. You must watch your dog closely for signs of interrupted urinary flow, frequent urination, scanty urination, or blood in his urine, and react immediately if they are seen.