Mommy hello! Can you please tell me if it's normal for a child to go f…

Mommy hello! Can you please tell me if it's normal for a child to go from 4+1 bowel movements in a day to one in a day? We are on Gv but I supplement with 60ml of formula before bedtime (he drinks different amounts: sometimes finishes all, sometimes half, or only 10-15ml). I give him enough water. Since Monday we have been getting a classic massage at the clinic (20 minutes each day). And for the last 5 days he has only pooped once (color and consistency haven't changed). He is gaining weight well and also defecates normally.