Phase or somthing more?

My daughter (10 months) doesn't ever seem to be full. She seems she would eat herself sick if we let her and even more!

We have noticed at home and daycare recently just said somthing to us about it, if she sees another child eating she gets mad if she cant have any or if we dont give her more food because she has already had lots she will throw a fit.

She is a happy baby but when food is around she will cry untill she can eat and it takes a little longer to calm her down after we have to take the food away. Food makes her happy and she wont stop eating when she if full!

Doctor is not worried about her weight at this point. Im worried this will turn into somthing more when she is older. Is this normal? Just a phase??