Ways to plump up 2 year old

Kam

My daughter just had a regular physical today, she only gained 2oz in 6 months. That's also when I stopped breastfeeding.

Her pediatrician wants me to plump her up a little, she suggested whole milk. But I was wondering if there was any other healthy ways to plump up my baby.

For context she has been below the 3rd percentile for a while.