Possible heat after spay

Vets, My female cat was spayed in January of this year. She was 5.5 months old when we got her spayed. She never went into heat before spaying her and now she’s acting like she’s in heat. She’s a little over a year now. She has clear discharge, meowing all the time, rubbing against my male cats, shaking her little booty, and has been humped by them. (All my animals except my 4 month old foster is fixed) other than these symptoms she’s her normal kinda skittish kitty I truly believe she’s in heat. The vet wants to run a urine culture for UTI and rule out leukemia. They also want to run a $600 hormone test. They are the ones who spayed her, and said if it comes back positive they will take her of all tests and second surgery since this is their fault But before I do the test is there any way this could also be a UTI or Kitty leukemia?? Those are what they are thinking it could be too? She’s not lethargic, she eats, poops, pees and plays normal.  

Hello!  Cats with a UTI sometimes rub their bottoms on the ground, or go to urinate and then stop, and sometimes produce very small moist patches of clear urine, so I see that a UTI could be a differential diagnosis (meaning:  another possible explanation) for heat-like behaviour in a cat that has been speyed.  Cystitis is also painful and cats sometimes cry out as they pass urine.  It is also very easy to rule cystitis out with a simple urine test.  If it were to be a UTI, it would be very important that your vet knew about it, so the test may be a good idea. I don't know of any symptoms of leukaemia that look like this, but you should ask your vet to explain; most vets like to talk about the scientific bit and they should be able to explain the thinking behind their course of action to you. Communication between vets and clients is really important when things don't go to plan. Sometimes ovarian tissue can be left behind after a spey. This can happen because of a surgical mistake, such as leaving part of the ovary behind.  However, it can also happen in cases where extra ovarian tissue forms within the body at a place other than in the ovary, so that even when the ovarian tissue is gone, the extra tissue still makes the hormone and the hormonal signs remain.  This scenario can occur even in cats that have been correctly speyed. Best of luck with things going forward;. I would be fascinated to find out what happens next!