Partner.

Here he's again, Spike my best beagle friend.
Where I go, he goes. It sometimes drives me crazy. But he sticks with me even when I'm working overtime at home.

When I look behind me, this is what I see: Spike staring at me.
When I don't look often enough, he will start moaning.
But when I hear loud snoring coming from behind me, I know I don't have to look for a while.