She's got what my Dad has..... A broken full button!! He truly has no feeling of full and doesn't remember that he has eaten. He will get up from the table, go into the den, and before the dishes are done he is asking when we are going to eat. Mom swears she doesn't eat as much as Dad but that's her memory!! Both have gained weight since they have been in AL.
Just make sure that what she is eating is healthy and not sugar coated or carb loaded. Martha is right, you might want to drop the boost if she is eating a healthy diet. If she's just eaten a huge meal then give her a little snack or delay it for a while. Sometimes just a cheese cracker is enough. Just something to let them know they have eaten lately.
I did find out that if I left the empty plate or ice cream bowl where Dad could see it then he figured he must have just eaten and didn't ask to eat quite as often. If he did I could just point to the place and he was satisfied.
You can check with the doctor but I say... let her eat. A time will come when she can not eat and it will serve her well