They're totally unpredictable. They expect you to cater to their every whim. They leave hair everywhere. They drive you nuts and cost an arm and a leg. They're tiny women in little fur coats.
Dogs lie around all day, sprawled on the most comfortable piece of furniture in the house.
They can hear a package of food opening half a block away, but don't hear you when you're in the same room. They can look dumb and loveable at the same time. They growl when they are not happy. They are great at begging. They leave their toys everywhere.