From what I've been reading, it sounds like you may need to up your carbs above 0 with a little salad or vegetables or something. I've been eating a salad (green leaf or spinach, broccolli, feta cheese, oil and vinegar, and chicken or something on top) a few times a week since I started weight loss.

If it doesn't cause cravings, this may also keep you from high carb binges. To me, 1000 calories doesn't sound like enough meat OR fat to keep you from muscle wasting.