How is his nose? Is it cool and damp, as normal?

And yes, our first St. Bernard, Freckles, would pout, mope and look depressed when my mom left for a week for a convention each year. She wouldn't eat much at all the first night - and this was 185 pounds of dog - and would only grudgingly accept food the second night, and would refuse it entirely if my Dad touched it (he drove Ma to the bus - a.k.a. "took mommy away") but would eat if us kids stirred her food.