So, I know things like tomatoes, garlic, onion, chocolate...maybe some other things...are deadly to cats. How much do they have to eat for there to be a problem? Like, my kitten is a beggar (though, he's learning slooooowly....) and sometimes will grab some food and run off with it. Is it a problem if he *accidentally* gets a small piece of onion (if we're chopping them and looking the other way). Or if he licks some garlic sauce from my plate when I'm not looking...? Or if he takes a bite of something w/ onions in it..? I know this sounds terribly paranoid, but I just want to be extra careful with my little buddy.