firstly, is she putting on weight/ growing ok according to your doctor? If so then try not to worry. If you haven't had her checked in a while then maybe you could to put your mind at rest.
How much milk is she having in the day? Could it be too much and it's putting her off her solids? If I try to feed dd and she is not hungry she will scream to get out the chair.
Does she refuse to take things from a spoon? This is very common and perhaps you could try lots of finger foods. Does she have her own spoon and perhaps bowl to hold while you try to feed her? This always helps me to get more in dd.
One year old appetites vary hugely- my dd has a huge appetite but my friend's dd of the exact same age has a very small appetite- they are the exact same height but she weighs 4lb more then him! But they are both healthy and doing just fine.