I think we often have to make our own decisions regarding when and what medicines to use; things are often not clear-cut. When you are the person on the ground sometimes you just have to listen to your own instincts - particularly if you are getting conflicting advice!
Personally, I don't give antibiotics unless there is a clear sign of bacterial infection. Antibiotics kill bacteria, so there is no point giving them unless there are bacteria you need to kill. They kill all susceptible bacteria, which will include the gut bacteria needed for normal digestion and which help with fending off unfriendly bacteria in the gut. Ironically you can even make your charge more susceptible to infection by giving the wrong antibiotic at the wrong time.
If antibiotics are not indicated, you can pretty much always give a vitamins + minerals injection or drench to give the patient a pick-me-up.
plt102, how is she doing today?