Your kittens are 27days old cat you feed them kitten food?

27 days is a little young to start feeding them solid food. Your kitten starts eating kitten food whenever it feels that it is ready. You could keep a bowl of food out, and water out if you like. At this stage, kittens may begin to explore regular cat food and might want to try it, but many start around five or six weeks. I would stick with soft kitten food at first.