We are starting our 3rd week of solids. The first week Lorelei seemed interested and was very variable about how much she ate. The next week she didn't seem to want more than one bite. This week all of a sudden she grunts like crazy when she sees me get her food ready or when she sees me eating (even if she has already eaten). I had been doing one solid feeding a day but this afternoon she seemed so hungry after nursing, I gave her a second round of the solids and she ate a good amount. She's nursing as much as before. Is it odd that she is all of a sudden so hungry?