How long can you leave wet food out before it spoils? I'm going to be gone for 3 days in July and my sister will come and feed my animals once a day, but I'm wondering how much wet to have leave out for the kittens? I was thinking maybe leaving them a 1/2 can each and then dry kibble, since they get kibble at the end of the day anyhow, once they've had their 3-4 meals of canned, because I can't afford to feed them all wet, they eat too much. LOL!! Right now they eat about 1 1/3 cans of the 5.5 oz cans per day.