I have a 20+ lb black cat who is bigger than many small dogs. He looks very scary. However, he is the laziest, most laid-back cat that lives with us. I laugh when people are afraid of him...all he wants to do is eat and occupy every square inch of available laps. Oh, and eat. Did I mention that he likes to eat?I like cats a lot but they are the true sociopath in the animal/pet kingdom.
One hangs around my dad's and my dog freaks out at it sometimes, and the cat just sits there and calmly stares at it to a point where the dog looks terrified.