I'm a Yorkie newbie, but would a bullystick count as a chew? I guess it would. LOL. I mean it is a chewing thing. But when I need a few minutes of down time, I always give Katie Scarlett her bully stick, put her in her x pen on her big girl bed, and she quiets down. It took her a few days to realize that I wasn't going anywhere and she could take her eyes off me to enjoy her toy. Is there any special toy you could reserve for only down time in her x pen? If it was one she was just crazy over, she might even look forward to down time.
Sorry if I did not help any. I know these old pro's will be a lot better than me! Good luck hon!