Leaving dry food out for your cat overnight is generally not recommended. Firstly, it can attract pests like ants or cockroaches, which may infest your home. Secondly, dry food left out for long periods can become stale and lose its nutritional value, potentially causing digestive issues for your cat. It's better to establish a feeding routine where you provide fresh food at set times during the day. 

If your cat tends to eat small amounts throughout the day, you can offer smaller, more frequent meals or consider investing in an automatic feeder that dispenses controlled portions at specific intervals. This ensures your cat gets the nutrition it needs without the drawbacks of leaving food out overnight.