Many urinary tract infections will lead to a changes in urine pH which will in turn lead to crystal formation. A food change may help change the pH back to normal during treatment and make her feel more comfortable, decrease bladder inflammation and reduce stone formation. Typically foods used for crystals during UTI treatments are not used long term. This is because, if the crystals are made from the UTI - then it would make sense, that once the UTI was resolved, the crystals would not be present. A follow up urinalysis 10 days or more after UTI treatment is complete can help evaluate for persistent crystal formation. Sometimes veterinarians may just want to permanently change your diet - ask him. Sometimes some foods are better at regulating crystals than others - regardless if a UTI is present or not. FWIW - I am not a raw food advocate.
Christopher A. Lee, D.V.M., C.V.L.S.
Promoting surgical options and pet comfort through the use of lasers.