DEAR PAW’S CORNER: I have a small, mixed-breed, mostly terrier named Cookie. He’s a darling to me and my son, but to anyone else, he’s a terror. He is a rescue, so I don’t know what his early life was like or if he was properly socialized. But I’m worried about having company over because he will bark ferociously at any strangers. What can I do to stop this? -- Janice L., Trent...