Not hungry!!
It's normal for me. I have days I am moderately hungry, days I want to eat everything in sight, and days I'm not hungry at all. I don't worry about it unless it lasts several days. That's rare for me, but when that happens, I use protein shakes and try to make sure I'm at least getting my liquids and protein in. If it's just a day or two, though, I don't even worry much about protein.
Please note: I AM NOT A DOCTOR. If you want medical advice, talk to your doctor. Whatever I post, there is probably some surgeon or other health care provider somewhere that disagrees with me. If you want to know what your surgeon thinks, then ask him or her. Check out my blog.