Small babies and milk

Me

So let me start and say that those of you who are going to preach no cows milk, I am not looking for that opinion or for you to advise me against that.

So for those of you who have smaller thinner babies, will you be using cows milk or toddler formula, or maybe pediasure? My son turned a year last week and he is thin. He’s about 30 inches and 19 pounds. He’s also VERY active. His father is 6’3” and 168 pounds so there’s a chance he’ll be like his dad. We go to the doctor next week but I figured I’d ask if any of you ladies are maybe doing something else or a combo. I’m nervous to cut out formula and the nutrients and fat content of that.