wrote:

Thanks Yngver. My cat lost some weight a couple of weeks ago
(which I thought was due to all the smoke from the wild fires)
but has gained most of it back.

Right now beside the high red blood cell counts in the urine
she's doing just fine. I don't even have to give her Prednisone
(for the IBD) that often any more.

Another option is to check her urine again in a week or two.
I think there's a good chance it will be normal again.

You're welcome. I think if you are leery of the antibiotics, doing another
urine check later would be a good option. While urinary tract infections can be
resistant, and your vet was following a reasonable protocol (if the first
antibiotic, often Clavamox or Amoxicillin) doesn't work, try another like
Baytril), why give an antibiotic if it's not necessary?

When my cat (different cat) had microscopic amounts of blood in her urine,
there was no evidence of any kind of infection, and so the vet suspected it was
simply due to sample contamination. Since she wasn't showing any signs of
illness by then, the vet recommended just watching her. She was fine.