Callie, maybe? DD's older Basset has chronic UTI problems and is now at the Vet's with fluid on the lungs, bad UTI, and was recently diagnosed with a heart murmer. I suggested she ask her Vet about giving her D-Mannose, but know nothing about dosing it or how to use it. I'm hoping her Vet is familiar with it, or at least willing to look into it. I know mine wasn't with Winnie. So I'm looking for further information to give her. Thanks!