Greetings 15–17 loose stools daily, coinciding with a switch to Nan-Pro 2 formula, accompanied by gas and initial white coloring.Passing stool more than 10 times a day in an infant represents severe diarrhea and requires immediate, urgent evaluation by a pediatrician. Three distinct potential causes for this presentation include a secondary lactose intolerance triggered by the formula change, a formula protein allergy or intolerance, or an acute viral or bacterial gastroenteritis. Three distinct medical management strategies typically involve prioritizing rapid rehydration with a standard Oral Rehydration Solution (ORS), continuing frequent breastfeeding or formula feeds as directed to prevent severe dehydration, and introducing zinc supplements under direct medical guidance to reduce diarrhea severity. Watch carefully for critical red flags including sunken eyes, extreme lethargy, or fewer than six wet diapers in 24 hours, which require immediate emergency care.

Give Probiotics and zinc.

Probiotics and zinc is suffice

Give Probiotics Enterogermina half tube morning and night for 3days along with other medicine