What Is This?

What is this? and what is it doing on the desk?
I am the official greeter!

Its larger than a chipmunk but smaller than a squirrel.
Ruff is larger than it.

Its too little to play tug with me. Everyone is hollering at me: Sparky! Watch your feet. Sparky, don't drop that bone on her head! Sparky!

What good is this little dust mop? It can't play with me. . . and why does it look like it belongs on the desk?

Sparky T. Ray..........................................................................................................................................