V.M.
I don't think you need to worry. It sounds like she's doing the normal toddler thing, disconcerting to us moms but totally normal and not usually a problem. The best advice I ever got was from a doctor who said to look at the toddler's food intake over the week, not at each day. I remember my second baby seemed like he lived on a few handfuls of cheerios a day for a while but I just kept offering foods and eventually they do start eating larger amounts and a wider variety of foods. My son also went through a long time as a toddler when he grew taller and didn't gain weight, which seemed weird but he was perfectly healthy and his pediatrician was not concerned. So I say just keep offering healthy foods, relax, and don't worry about it!