she has had 2 sterile urine extractions in the last 30 days. she has suffered these uti's for aprx 2 1/2 yrs. she had xrays come back showing nothing.ultasound also nothing.we changed vets.current vet put her on prescrip diet royal canine SO.she is currently on clavamox. she has been prescribed zenequin &batril in the past and found to b highly allergic to both. she never leaks urine when sleeping.