That's where a dog crate comes in handy
.....have one cat always eat its meals in the dog crate (or another room). Problems sometimes arise for a cat that likes to eat only a little and then graze the rest of the day with one that'a a piggy who eats all its food at once and cleans up other cat's food as well! If that's the situation, you may have to just feed them their morning meals, and then remove any uneaten food if you have to go to work, give them an early evening meal, and a late evening "snack". You may have to adjust quantity of food with growth spurt with your 8 mo. kitten. You'll have to observe on weekends how much food they need to eat at one meal.