Smart Mama Advice Needed - Hershey's Chocolate Syrup, Carnation Instant Breakfast or Ovaltine??

Based on some advice from a pediatrician friend, I'm going to begin limiting her milk consumption. Maybe the obscene amounts of milk she was drinking (5 + glass a day) had something to do with her irregular bowels!

My munchkin LOVES chocolate milk. I'm just not such a fan of giving her chocolate milk. I'm not sure why. I was thinking about letting her have one of serving of milk with either good old standard Hershey's Chocolate Syrup, Carnation Instant Breakfast or Ovaltine. I thought it would be a nice treat for her. I'm leaning towards Ovaltine, but I'm not even sure why.

Advice needed!