How To Improve Appetite In A Kid?

Hi, My 19 month old was a good eater and used to eat all solid foods. For about a month she completely lost her appetite an is only taking milk and juices. She has lost around 2 kg in last 20 days. I have tried every thing but she is refusing any solids including her favorites like egg or potato.. she already had a deworming medicine (mebex) and neopeptine but with no result. She is otherwise active and has no other symptoms of illness. Please suggest.