I used to get a little frustrated when some of mine wouldn't eat.
Some of them didn't want to seem to eat every week. So I quit trying to make them. The ones who seem to prefer small prey get small prey. The ones who seem to prefer every two weeks get offered food every two weeks.
There are still missed feedings, but not as many as before and it's not nearly as disappointing when they do skip. If the environment is correct they will eat when they want and that will frequently not correspond with when we think they should eat.
Yeah, I'm mainly just frustrated that she isn't eating, when she was fine before. But it's normal. I just have to remind myself that they aren't on a timer.