Ok, poor Sluggo keeps battleing UTI's. I see crystals in his urine now even though he finished a two week run of Baytril about 2 weeks ago. I'm getting frustrated and the vet wants to change his food AGAIN! Sluggo was just switched a month ago to the Natural Balance Venison and Green Pea. It's supposed to be an allergen free formula. Does anyone have an opinion as to whether or not this food would encourage crystals in the urine? It seems to agree with Sluggo's tummy and he loves it, so I hate to switch again. The Science Diet junk the vet wants him on gives him diahrea. I don't know what to do. HELP!