Which is kind of weird when you think about it since they're both predator animals. You'd imagine that evolutionarily they'd both be more inclined to each as much food as they can when it's available because they don't know when they'll catch another prey.

Though I read that because the small cats we have as pets hunt mainly much smaller prey compared to themselves and they feed multiple times throughout the day, whereas dogs are descended from wolves who can spend days at a time hunting much larger prey before getting a kill, a cat's stomach is also a lot smaller in relation to their size than dogs. So a cat could well actually be full after just a part of their daily portion, and physically don't have space to finish it unless they go off to digest for a while before coming back, while a dog is specifically adapted to gorge themselves as fast as possible and then potentially go without food for a long time.