J.P.
If you just went back, I think she needs some time to adjust to daycare. All babies show this change in their routine in different ways. For some it is sleep, for some it is fussiness, for some it is eating. If she gets hungry, she will eat, she is just on strike for now. My daughter is 5.5 mo and has been in daycare for 3.5 of those months. Even now, she has her off days and it takes 3 attempts to get her to eat. They just try again later. She also won't eat at all with my husband. I have to travel next week for work, so we will see how she does. Luckily, she is a pretty happy baby even when she doesn't eat, and I know that she will eat at daycare, so she may just be on an evening/morning strike.