Toddler won’t gain weight

Hi everyone,

I’m concerned as to why my toddler is not gaining or how I can get her to gain weight. She’s 1 or 17 months and weights 21 lbs. The doctors have been concerned about her weight gain for a while but continued to give her time to see if anything would change but suggested at 18 months she’ll have to do blood work in order to see if something is wrong. She’s not a big eater and also very picky. I’ve had a hard time finding foods she actually likes. Things like rice, potatoes, ground meat, yogurt, pastas, spaghetti, and bread she likes but will eat what to me seems to not be sufficient I know I can’t tell what enough for her and she can’t talk as yet. However to me she’s not getting a balanced diet because of the pickiness. She doesn’t like veggies and even chicken she’ll spit out. Fruits are a definite no for her, doesn’t like juice or even popsicles lol. She gets those things for Gerber baby foods but I feel she’s old enough to consume these things normally 🤷🏽‍♀️ I’ve taken record of her weight over the coarse of 3 months and she’s literally gained 1 lb. Please help