Hi there.. loose stools is common in this age as you add foods other than breastmilk.. no need to worry if baby is active and taking breast feeds.. continue breastfeeding.. give oral rehydration solution each time after baby passes stools. Avoid diary products, fruits, fibre rich foods.. you can give ripened banana as it adds bulk to stools and helps in making formed stools.. you need to consult paediatrician if baby is weak, refusing feeds, dehydrated..