First off, if you went by what the manufacturers recommend on cat food cats your cat would be clinically obese. Even the best of foods list the amount to feed as nearly twice what it should be.

Secondly, contrary to all the "expert" comments, canned food is FAR healthier for your cat than wet food and doesn’t lead to all the problems that the "experts" say it does.

Thirdly, here’s a site that tells the TRUTH about why cats NEED canned food – http://www.littlebigcat.com/index.php?action=library&act=show&item=whycatsneedcannedfood

Fourthly, dry food does NOT clean the teeth http://www.littlebigcat.com/index.php?action=library&act=show&item=doesdryfoodcleantheteeth

I have four cats and I feed them the smaller cans of food so there’s never any waste. If I use the larger cans then I end up either putting too much on their plates or stick the rest in the fridge where I never remember to take it back out again – so into the trash it goes. My four cats split a small can twice a day and I also feed them dry food, Innova Evo, which is 50% protein and contains zero grain. With your two cats you could just feed them once a day and split one small can. If this is all you’re feeding them then I’d give them each half a can twice a day.