We stopped bying tins of cat food, as mostly, some of it went to the bin as rotten. Now we buy those little bags (100g.). Casper and Kitty get half of it in the morning, and rest in the evening. During the daytime, they have dry food available. Ever since we started byuing those bags, not a tiny piece has been left to the dish, and sometimes they even beg for more. But nope, we're not giving. And by changing into those bags, we have reduced the amount of wet food we give them. We still will give it, but will also make sure they get their teeth done. Luckily they both like dry food a lot, and few of the snaks we have for them, are hard as well.