I'm sorry to hear about Minnie's UTI. Is it possible that Minnie could have diabetes? The reason I say this is because my cat Ali has diabetes and would often get UTI's if there was too much sugar being spilled out w/ her urine. The answer to this problem was to find the right amount of insulin for her get in shots every day. Ali has not had a UTI in about a year. Just a thought. Minnie will be in my thoughts.