Supplementing

So I started to supplement with formula about a month ago. I told my mom 2oz of formula 2oz of breastmilk mixed together (recommended by ped.) Come to find out, she has been making the formula WITH breastmilk and not water 🤦‍♀️🤦‍♀️🤦‍♀️ so he has been getting 4oz of breastmilk mixed with the actual formula powder. wth mom! No wonder he such a fatty. But anyway, is that okay? or should I cut him down on milk? bcus he is also getting rice cereal in the mornings and some sort of veggie puree for lunch.

Here's my fatty. Will be 5 months in just a few days.