I had a Sheltie who had to be put to sleep four years ago. I swore I would never have another dog (I've had dogs since I was old enough to remember) but after just a few days I was so lonely all day. I didn't realize how much I depended on him always following me everywhere. We soon got a yellow lab puppy and she does the same, following me even into the bathroom. Now I am certain she's my last dog.....