Try and find smaller containers. That is what I have had to do. Bailey picked up a nasty virus when we were in San Francsico a few weeks ago, (not sure if from the hotel or the grass at the pier she went potty on)
I had her on white rice and boiled chicken, then baby food and some dry (changed dry food from Royal Canin to Natural Choice) now natural choice wet and dry.
My mom says you can freeze the wet food but I have never tried that. Sounds kinda gross..
I don't know how it would thaw out and if the nutrients would still be in there?