Are you past induction? If you are then you can add in some variety. Try getting a low carb cookbook and trying some new recipes.

If you're in induction, I'd say enjoy the decrease in appetite and make yourself eat at least 3 reasonable meals a day.

I had the same problem, and sometimes it comes and goes unexpectedly. I just lose my appetite and forget to eat. But Atkins is clear that we shouldn't go more than about 6 hours during the day without some food or it affects our glucose/insulin.

Squid