My 4yo spayed cat Sabrina has recently been taking several minutes to urinate both in the box and out. My husband first noticed she would squat and sit for several minutes on a throw rug then when she got up there would a round urine spot. So we took her to the vet who said her kidneys were fine but there was possible bacteria in the urine so she prescribed a round of antibiotics which Sabrina is still taking. Today however I noticed Sabrina sit/squat for a minute and a half then she got up and smelled the spot. Five minutes later she went to another spot and sat/squatted for 4 minutes and then got up and smelled. Both times were in the grass which had just been watered so I couldn't tell if in fact she had peed. Sabrina is an indoor cat but about once every other month she wants to help me weed. But now I'm gravely concerned because I don't think it should take this long for her to urinate. When we took her to the vet she advised that Sabrina's peeing could be behavioral which we can work with but she has never taken this long to go to the bathroom before. I'm wondering if I should take her to another vet for a second opinion. Is it possible she has a condition not found by the vet? Is this behavior reminiscent of bladder or kidney problems? Any answers would be appreciated. Thank you.