need ideas for help gaining weight for my lil one.

I have a 1 yr old with cf. She always seems to be two pounds lower than they would like her to be. Shes just so small. Cutest darn thing though so funny even at a year. I seem to have tried a lot. Tried avacados, nope she don't like them. Sour cream, strawberry syrup, maple syrup, ciannamon , sugar, ice cream bars. How do I get her to take food even when she refuses. Some days she eats like a pig 700-950 calories a day. Sometimes only 600-750. Dietiation tells me she needs to be eating around 900. We've condensed her formula, now were tryingvto switch her between whole milk and pedisure drinks. So much difficulty trying to get her to drink her pedisure. Tried bottle tried sippy cup. Any tricks and tips would be helpful.
Source: Cystic Fibrosis Nutrition Forum - Category: Nutrition Authors: Tags: Nutrition Source Type: forums