It's funny that I am noticing how certain pets seem to have S.A.D. (Seasonal Affective Disorder)  One in particular (my Stan man) seems so down  in the dumps on gloomy, rainy days.  He flops, he grumbles to himself, growls a lot, and goes out to pee at the closest tree before dragging me home.  I don't know what to do for him except remain upbeat and give him treats to make him smile.  Post treat, I still get the exasperated face, heavy sigh, and a flop on his bed.