Maybe he's just been hungry?

Once in a while, Tiernan might tell us "I hungy" but most of the time it's a guessing game on our part. If it's been a while since his last meal, we'll just figure it's time for the next one. But he still isn't able to tell us if he is full or if he hasn't had enough yet... I just feed him until his dish is empty. So about a week ago, I started questioning whether his meal sizes are enough for him. Now that we have been giving him bigger meals, he seems to be sleeping better at night. Maybe he's just been hungry?