Hello dear,
Thank you for your contact to health care magic.
I read and understand your concern. 
I am Dr Arun Tank answering your concern.
Green and 
loose stool in the baby is because of acute 
gastroenteritis.
I suggest you to maintain optimum hydration of baby by giving him ORS or Oral Rehydration Therapy.
If you maintain the hydration nothing much is required, everything will be cleared soon.
You can start the antibiotics drops like 
norfloxacin and 
metronidazole under doctors guidance. This will clear up bacterial and ameoibic infection as well.
Eating curd will replace the normal 
gut flora and so can help your baby recover fast.
Please maintain good hygiene in babies surrounding as only this small step can clear infection. It also prevents future infections also.
I will be happy to answer your further concern on bit.ly/DrArun.
Thank you,
Dr Arun Tank
Infectious diseases specialist,
HCM.