Well I don't have any help for you but here's what I do....
I try to take them each equally when I go to somewhere.... Like I go and visit my dad 2 times a month and I take turns with them each time I go. I don't know if they really realize it but I try ya know. Lucy never seems to be bothered when she's the one staying home but Tank really doesn't like it. He trys to be a little rough with Lucy when I bring her home.
I would take them both if it wasn't for tank being a little agressive with other dogs. I know he's still young and I'm hoping to train him out of it myself but if it doesn't work them I guess I'm gonna have to fork out the money for a trainer..
My dad has a pom and it's to much to look after tank and lucy.
Well I guess I'm not much help, I guess like someone else said you'll just have to try it and see how the other dogs act when you come back home.
Crystal