I have just returned from the Vets with my adult male Cat. He had to have emergency treatment for a urethral obstruction, something i had never heard of. When asking the tech when i picked him up what i could do to help prevent this from happening again and him being in such pain all i was told was diet, then she stated there was a food but it was expensive and never gave me the name of it. So i have been researching for hours and that is how i found this site, the only thing i can find is to feed him food to increase the acidity of his urine. Can anyone tell me what the best thing to feed him would be to promote this? thank-you so much.. He is my youngest "son" and i cant stand the thought of him going through this kind of pain again.