15 Interesting Facts About Cavalier King Charles Spaniels By Allen Abby - Cavaliers have a soft personality, so yelling at them is counterproductive and likely to send these sweeties into the sulks or into hiding. Because he’s a spaniel at heart, he may try to chase birds, rabbits, and other small prey if he isn’t kept on a leash or in a fenced yard. Cavaliers may bark when someone comes to your door, but because of their friendly nature, they aren’t good guard dogs. Please follow and like us: