Green mucus stool after eating since 5 d

My son (2 years 5 months) started loose green stool 5 days back (11 mar evening). We were on vacation (del to shimla). Just after loose motion he got high fever with pain in eyes. We gave paracetamol and cold towel compress . Next morning went to Paediatrician (12 March). Temp was 103. He gave ondem syrup, enterogermina, calpol syrup and ors solution for 3 days and advised watch for redness in stool. Fever has gone now but body feels warm sometime in night. I am giving 1 enterogermina daily for 5 days now. My baby is playfull and doesn't show any sign of discomfort. But whenever he eats he feels like something is going down in his stomach and after some time he poops green mucus stool which is very smelly sometimes. Urine is clear white. Please  advise how to stop green stool. Right now only entergermina and ors is being given and no anti biotics. Is it something to worry or is a common thing???