I am sorry, I do not have an answer for you.
Just wanted to say what a cutie pie Callie is!! Zoey frequently elevates her head, other times she curls up in a ball, and yet other times she hangs it over the edge of her bed

. I worry most about 'over the edge' but I guess it is comfy for her so I just keep an eye on her.
Hope someone has some ideas for you but she is just a cutie deserving of tons of love, hugs and kisses... of course you already know that