Hello dear
Warm  welcome to Healthcaremagic.com
I have evaluated your query for  your  baby in details  .
*  This is in relation with 
gut flora disturbances  from bottle  feeding .
*  Recommended  for  better  outcome  as
    -  stop bottle  feeding  right now .
    -  give  only  breast  milk .
    -  observe  for  next  48  hours  about  change  in  stool  color .
    -  consult  later doctor  only and only  if  color  remains  green , 
        otherwise  absolutely no necessity of doctor  visit .
Hope this  will help  to clear your doubt   .
Wishing  him  fine  health  ahead .
Always welcome for any further assistance anytime .
Regards  .