My son 6 months old after starting solids was pooping once a day and was firm. Since last 2 weeks he poops 3-4 times some days and somedays 1 a day. Sometimes it is mushy and the very next poop it is perfect. As he now been doing this since 2 weeks, is it normal? He looks very normal and very active. Doesn't seems to have a problem. But if he has loose stool ( once) by morning the next stool in evening is firm. Why it happens, we also took a pediatrician advice to have zinc drops, but still he does this and now they say it's normal