By my measurements at home she is 43" tall and weighs 34 pounds, which puts her BMI at 12.9, which is where it was last June at her UAB appointment. I know they'd love to see it over 13 so I'm really hoping she can pack on a few pounds by then. I always feed her yogurt as an after school snack and now I've switched it to ice cream (the other two girls are insanely jealous, let me tell you). The only problem so far is she seems to eat less dinner now that her afternoon snack has more fat and calories, but hopefully she's still coming out ahead a little. I'm going to do this for a month and see where we are in February.
Just for comparison, Addy's BMI is 15.0 (24th percentile) and Morgan's is 15.5 (60th percentile). Riley is in the 1st percentile, so yeah, she needs to gain a little.