Happens all the time around here too! Now, for example, I'll put half the deviled eggs on a plate with saran wrap...DB will dig into those... and I'll put my food in a green tupperware with a lid. I'll tell him, I made some deviled eggs for myself, if you want a couple there in the fridge, but don't touch anything in the green tupperwares...they're special foods for me.

Usually this works ok...of course I don't think he's trying to sabotage me, he just thinks all the food in the fridge is fair game! So separating how its wrapped with a warning ahead of time just might do the trick.

When I make my jello treat...I have to get him his own goodie, like a small carton of ice cream, this way I can say YOU have ice cream for a snack, and I make a special diet jello thing for MYSELF. If he needs any further clarification, I'll just whine about how I get so little choice, how could he possibly use up the last little bit of pleasure I might get out of the fridge...this works too .