Here are five (mostly) scientific reasons why dogs trump cats. 1. Exercise motivation While dogs demand physical and recreational activity, all cats demand is food and a comfy sofa to sleep on all day. Great job being a role model, Felix! **** 2. Give the elderly a purpose Pets are wonderful stress relievers for people of all ages, but the elderly in particular benefit from owning a dog. **** 3. Sniff Out Cancer Cats have an attuned sense of smell, but they're difficult to train. The top cats also can't match the top dogs nose for nose. **** 4. Smarter...