Hi..Green coloured stools can to due to various reasons ..any diet including green leafy vegetables or cowmilk allergy can cause and increased frequency of stools due to any viral/bacterial infection are the most common reasons Check for child hydration status...if looks dehydrated kindly consult local paediatrician Occasional cough doesn't need any medications if cough is troublesome consult paediatrician

Hi, Get a stool routine test to rule out infection . Reduce milk and milk products