This is the model currently being sold for very cheap on "SECONDLIFE!"
This item comes with three different versions, one is a animated pet with two forms of animations, one standing as you see here and one of it walking when your avatar walks!
The two other versions are both stationary versions, one lays atop your head in a laying down pose, and the other is one that is scrippted so your avatar hugs it like a cute plushie to their tummy!