[header] How to take care of nursing cats [title] Feed a pregnant cat enough to increase its weight. [step] Mother cats will typically lose weight while nursing their kittens. To prevent the cat from losing too much weight, you should begin feeding her more than normal in the final third of her pregnancy. 
Feeding her too much before the last third of a cat's pregnancy can lead to her become overweight and that can make giving birth more difficult. [substeps] A mother cat's body weight may have increased by 40 to 50% by the end of her pregnancy.