The occurrence of snow in the Seattle Tacoma area is extremely variable and usually melts before accumulating to measurable depths. There are winters on record with only a trace of snow but at the other extreme, over 21 inches has fallen in a 24 hour period.
The rabbit's sense of smell is far more developed than that of the human. Moveable folds inside the rabbit's nose assist in the detection of scent. The sense of smell in a rabbit is present at birth, allowing a newborn to find his mother's teat. Rabbits shift their noses up and down when trying to identify a scent; this is called nose blinking..
The most common case of dead animal odor is a rodent such as a mouse or a rat dead by a poison bait. If the death occurs and it takes place in the attic - wall void or inaccessible crawl space - the animal will smell and in most cases the scent will last for several weeks.