Which One of These Is Not Like the Other?

Hint: One of them is headless, has lifeless legs, and is not stuffed full of catnip.

I'm kind of scared to call the realtor to ask if this little cat-delicacy was here when the people came to look at our house yesterday. I don't remember seeing it last night, but I didn't get home until nearly 10:00, and it does look like one of Hideaway's catnip mice at first glance ...

Yes, that is our new carpet.