Good morning,

You are right about the anti-biotics. If Ritzy has been on them for 4 days already you should have noticed a marked improvement in the problem. She may have a resistant form of the infection. BTW, a x-ray will not show a bladder infection but the blood work would indicate an infection (by an increased white blood cell count), but they can also grow a culture from a urine sample.

When I first got Emily we had many many problems with bladder infections. We started with the Clavamox, but later moved on to stronger antibiotics. The vet did run a culture on Emily and found out that it was resistent. So you might want to ask for a different antibiotic or if they will take a culture from Ritzy.