Consult your pedia mamsh. I had the same concern with my 1 year old. Nabanggit ko sya kay pedia last time na nagpavaccine kami and she prescribed an appetite stimulant in a form of capsule na minimix sa water or milk. Effective naman. Or baka naman kasi di pa maganda panlasa nya at baka nadehydrate kaya puro liquid ang gusto