For your missive-crazy aunt Eileen who lives with eight cats:
La Familia Green greeting cards (various prices)
Chicago-based eco-stationary designer Mollie Green makes cute, recycled-content greeting cards ideal for prolific letter writers like your animal-loving aunt. Choose from various designs for all occasions featuring llamas, ferrets, kitties, baby deer and, umm, James Franco. A percentage of sales is donated to no-kill animal shelters in the Chicago area.