Hi Suzanne,
I’d agree that struvite crystals are not a concern if there isn’t any infection. I see your vet as being through…. wants to confirm that there is no ongoing infection before ignoring as initially you reported symptoms consistent with infection and prior to antibiotics it wasn’t confirmed if infection was present or not.
I don’t see your vet as putting your dog through this test for nothing. My own dog had a UTI at a young age. It was confirmed by culture prior to any antibiotics. I remember getting her urine cultured multiple times post treatment to monitor for recurrence. I was always relieved what they came back negative and never considered the negative result as an unnecessary test.
