I feel guilty when I spend time with one & not the other. And I can totally relate to feeling like you're "cheating" on them. Our morning walk is as a pack, all three. But our evening walk is one at a time. It takes me an hour, but I feel like they need their own alone time everyday. Plus, it's our own separate bonding time. That one hour is the worst hour of my day. I feel so bad for leaving the others behind. We rotate trips to the store, or anytime I can take them in the car. But I still feel bad for the other two I leave behind. I had two Yorkies for a while & one of the reasons I got a third was so that one wouldn't have to be alone when I took the other out. But I still feel bad.