Hannah's urine isn't clumping (as it has in the past), so we're off to the vet with her today. It has clumped in the past, big size pee clumps, too. We've not changed litter, still using WBCL, and she's not peed outside the box. There's been stress in our home lately with the passing of Callie and now Hannah and Tumbles are duking it out for top cat position. We are running Feliway 24/7. This started a few weeks ago, but I thought it was Callie. Any ideas, helps, tips, or suggestions as to what's going on?