I've taken them each out seperately, just me and them, but the other was always left home with Dan. I guess my predicament comes in that, in order for me to take this class, I have to take it on Saturday. So, now that it's the summer, Dan's always golfing, so there is no way to know if he'll be home or not. I feel bad about taking one and leaving the other.
The only time I have taken one of them out and left the other home alone, was when Bailey hurt his back in April and I took him to the vet. I left Reese home for an hour.