[header] How to feed a pregnant or nursing cat [title] Switch your cat to a wet kitten food. [step] Towards the midpoint of your cat's pregnancy, begin switching her onto a high-quality wet kitten food. Kitten food contains higher percentages of nutrients and vitamins than do adult cat foods, and will provide the queen with more of the protein and calories she needs during pregnancy. 
[substeps] Keep in mind that your cat's food consumption will increase during pregnancy. She'll usually eat about 50% more than she would when not pregnant.