My dog, Cindy Lou has had a few UTIs. The last time we did all the test you’re talking about and it was always clear. While waiting for the results, I went to the local feed and pet store to get a product that I’ve seen on Amazon that contained cranberries. While there, I noticed another product for pet incontinence by the same company. While it did not have as much cranberry extracts in it, it did have the best reviews and I’ve got to say it cured the problem. It is called NATURVET. Senior advanced incontinence. It has a variety of herbal products in it including cranberry extract. It’s a miracle in my opinion. To do with CBD oil. Make sure you don’t give it later in the day because, I’m not sure, but it may relax your dog to the point. They might have a potty accident because they’re so relax while they’re asleep.