Hi. Thanks for your query. Noted the history about your 11 month old daughter. She has lost her appetite after severe loose motions. Became very lean and thin. I would advise you the following: Take her again to the Pediatrician for clinical evaluation, examination and investigations of the blood, urine and stool. Ultrasonography of the abdomen if needed. This will give an idea of any remnant infection which is the major cause of loss of appetite in children. Once the cause is found, this can be treated properly.