[anonymously]

And always:
“It’s important to provide your dog with extra fluids and frequent opportunities to urinate in order to keep his urine from becoming supersaturated. Salt should not be added to increase fluid consumption for dogs with cystinuria; according to studies conducted on humans, a low-sodium diet may decrease the amount of cystine in the urine”.

Excerpt from http://www.dogaware.com/articles/wdjotherstones.html#cystine