Panel 2: Maybe. Or maybe they're hungry because they didn't eat much of the lunch you made, because it sucked. Burnt hotdogs or something.
Panel 3: Cripes, enough with the carrots! Actually, Cookie Monster made a great pot roast today with carrots, celery and potatoes. But Lynn always seems to fall back on carrots. Plus, remember what happened the last time Merrie was asked to do something with carrots? And is she dextrous enough to peel?
Panel 4: I guess not.
Panel 5: Uh...okay. I guess the joke is, Mike can't deal with anything out of the ordinary. Always has to call for Deanna. Even if it means CALLING HER AT WORK. Like pharmacists are never insanely busy.
ETA: Wait -- something I don't get. If they "just had" lunch, why is he starting the dinner now?