What food is she currently eating? They should be eating a low fat or light/diet food. Unfortunately, if she is already on a light brand of food, there isn't much else you can go to except for seeing if there is a brand that has a lower fat content.
Offering some veggies in the evening will help her fill up a bit. How much on average does she eat?
she is now eating solid gold, chicken soup, and felidae. I feed her about a table spoon and a half A night. she weighs about 654 ounces this is down from 670 ounces is this good. she had A litter of 7 about 5 months ago, could this be baby fat? thanks nancy