Marco just went through a long bout of UTI preceded by a bout with crystals. We got him in an hour after the first sign of crystals but the bladder infection took a little longer. Our vets new partner wants him to drink more water and said we should give him 1/2 Cerenia every third day. I thought Cerenia was for vomiting which Marco never does. Did I hear that wrong? He's an indoor male, was an outdoor cat for 6 years before being tossed out. No other medical issues.