Toddler not gaining weight

Leeeilaaa • Mama to both 👸🏼🤴🏼

My daughter had her 3 yr well check and doctor said she hadn’t gained weight in 4 months since last visit. She recommended giving pedicure 3 times a day but I can hardly get the girl to finish finish one a day. She’s a picky eater and I’ve tried making milkshakes & smoothies with pediasure even made muffins and pancakes but she will say they are gross. Any suggestions on ways to help gain the weight doctor is wanting with a picky eater?