I too have what I call a nervous Nellie when I leave. I stay at home as well. What I have found is that if I leave her something with my scent and a few of her other favorite toys, she does much better. She has other playmates, to her it doesn't matter "she didn't get to go with Mommie" give this a try it hasn't cured her totally but she does much better, It may help your Shelby some. My little yorkies are silly though I can go outside just for a micro-minute and they all act like I have left them for a week with their happy greetings....
and kisses
