She has eaten, and the incision looks fine. She's been growling at the other cat as usual and even began growling/hissing at me. She was resting on my lap and when I tried to move she seriously growled at me!
I've noticed that her eyelids do open all the way, but most of the time they seem half open or 1/3 of the way open. She was walking around with them half open and I think she was growling at stuff that she thought might be the other cat.