Use of antibiotics so frequently may be hazardous, babies get common cold quite often which subsides with saline nasal drop and antihistamines. Antibiotics are usually not required

Antibiotics kill the bacteria which help in digestion and then overall immunity and growth of child is affected. Also it can cause ulcer or rashes on the body. May be the repeated cold and fever can be due to bottle feeding. Bottle feeding is common to cause throat infection, pneumonia, gas problems, ear infection and loose motions too. Majority of this infection may be viral only so avoid antibiotics whenever possible.

No. Not good if using every month Usually small children have viral illness frequently which do not require antibiotics most of the time. If babies are well, playful and active and feeding well but having cough/cold/fever, you can avoid antibiotics