Try to vary feeding times
This is particularly relevant to morning feedings. If you feed your cats at the same time every day, they will learn to expect food at that exact time and make sure to let you know.
In fact, if you feed your cat after waking up every day, many will try to train you by waking you up earlier and earlier every morning.
Make it so that your cats are fed when you’re ready to feed them to prevent them hassling you beforehand.