Hi, I'm NOT an expert, but I just had this conversation with the vet, my juvenile BP also is on Ceftazidime for an RI and I caught it very early. From what I understand, any observation of a (positive) change in symptoms is likely a good sign and different individuals can/will respond over different durations. Certainly it's recommended to continue with the full course of antibiotics (as I'm sure you plan on doing). Hope all continues to go well!