Dear Naveen Baweja,
4-5 stools/day in a 8 month old child can be quite normal. More important is the character of the stool...Is it foul smelling, containing pus or blood? Is the child having fever? If the answer is no, then there is no need of any antibiotics. Further look out for urine out put. Is it normal? If it has decreased, give him WHO ORS
. If the child is playful, eating well, urine is good then there is no need to worry. Just wait, he will be fine. You need to consult doctor
if there is fever, blood or pus in stool, child is irritable or drowsy, or if urine out put is very less.
Hope your child gets well soon.