We just worry about them when we leave them on their own..That is our JOB!! The first year I had Chester, I couldn't leave him home alone for Christmas and took him with me to my daughters house for Christmas day.. and I felt so guilty for leaving them all home yesterday while I went over there for Christmas dinner.. I KNOW that is just being TO silly but I can't help it.... But we sure had a good time before I left them so I am sure they slept the whole time I was gone and never missed me.