wieght loss

my 13 month old has never really put weight on right she was 3790 when born she is on the 50th percentile for head head 75th for lenght the doctors have done the test but can not find anything wrong with her.  I don't know what to do anymore she will not drink alot of milk but she eats everything when it come s to food the doctors have said to give her custard and yoghut to help put weight on but that is not working i do not know what to do any more.

[Renee Radenberg]

Her weight is below the 5th percentile and her height is on the 90th percentile for her age. She will appear thinner then she is due to her height. Suggest nutrient dense drinks in place of milk such as Pediasure, milkshakes (milk and ice cream blended) or yogurt smoothies (yogurt, frozen fruit , and ice cream blended) for additional calories and protein for weight gain. You wrote she will not accept milk then give her on a daily basis yogurts, cheese, puddings, and ice cream which are all dairy substitutes. Hoped that helped you.