Hi T.,
My daugther total, total went thru the same thing.
It is extreme hunger followed by eating normally, followed by not so hungry anymore.
I say feed her, let her eat as much as she wants but with rules. It has to be healty and she should stop eating two hours before you know she goes down for bed. The wee little ones can't sleep on a full stomach or they fall asleep and wake up alot.
1. Only healthy foods. There is no, I am so hungry I am gorging on oreo cookies. Cherios, raisins, sliced almonds, & granola in a plastic bag. Brown rice with red beans and steak cut up really small. Lots & lots of water or freshly squeezed apple juice with a carot added. Bananas for snack right after bananas in oatmeal. Wheat wraps with crispy chicken shredded carrots and argula cut into three sections.
My daugther is twelve now and she has legs like a race horse and she weights eighty pounds - she's thin. As they get older kids hunger become more evened out, but I know right before those long legs came in my daughter was eating two breakfasts, lunch and a snack and than dinner and than dinner again. She was drinking the soy milk down like water. And for school lunch snack she was taking an apple, plum and a orange. Apples are perfect for hungry kids.
I noticed that the parents who restricted their toddlers when faced with the hunger have chubby kids now who "sneak and eat". And than there are the over indulgent parents who if their toddler says boo, they stick a donut, bottle, cookie or juicey cup in their mouth.
This period does not last forever and when your toddler doesn't want to eat anything for a few days after you won't freak out.
Good Luck.