Up until the point of neutering don't worry about over feeding. They are growing and go through some quick and some slower spurts so it will probably vary.

Your kitten may be wolfing down their food though. One of mine has vommed due to getting overexcited about boiled chicken. He sometimes also gets hiccups.

Kittens want small and often feeding so maybe half the pouch, pop it in the fridge and a few hours later the other half. Obviously work patterns, etc may not allow for very even feeding but you get the idea.