My 3 year old star tortoise has respiratory infection. Had antibiotic (ceftazidime) injections for 6 weeks (15 injections), appetite is still good and been more active this week. Went back to the vets today and my usual vet was off. Another one looked at my tortoise and he said that 5 injections should have cured her, maybe need to do some test to find a more suitable medication. Advice me to try no antibiotics for 7 days and see if any improvements. Should I wait or do the test ASAP, thanks