My b also eat Meji (he is now 2 months + few days old), he has poopoo once per three days only. However, recently, I force him to drink more water each day and he has poopoo sometimes once per day / once per two days.
His poopoo is also quite "希" too, but I think it's ok ge...
My son (now 2 yrs old) and my daugther (now 2.5 months old) all take Meiji since birth. They all had 希poo poo and poo poo leaked out from diaper. It's perfectly normal. Meiji is already one of the best formula for BB. No need to change !