Sheng-Mei, that's hilarious about the cat food popsicle -- you should market that as your own idea.
Also, thanks for your input, Tim -- I try to keep one can going at a time, and I do have a little piggy of a cat (Mom) when it comes to dry food, but wet food is a whole other ball game. My cats are very picky about their wet food -- they will only eat certain flavors and consistencies. They just "know" when I mix the old with the new, so that really doesn't help.
Leaving out the food doesn't seem that bad to me -- I leave stuff out all the time and eat it when it's a couple hours old (I love leftovers!). If it is bad, well, there can't be that much more vomiting than there already is in this house.
Another question for you, Meowmie -- have you ever had experience with a cat that will not eat a particular food after he has vomited it up?
Since Nico has gotten sick, any dry food that he has vomited up he will no longer eat. I think we've managed to get his vomiting under control now that we know the cause, but it has become harder and harder to find a food that doesn't have chicken and he hasn't eaten it and vomited back up. Do you think it is a lost cause to try to get him to eat these foods again or do you have any suggestions?