Research in Japan has shown that having a picture of food on your desk has no effect on your work rate or productivity. Hmm. Ground breaking information, this.
However, a picuture of an adult dog can increase your work rate by as much as 5%.
And a picture of a puppy on your desk can increase your productivity by up to 10%.
Imagine the effect of having a real puppy on your desk....
I'd say that would be a reduction efficiency of about 100%. Until the puppy fell asleep, at which point, having cleaned up the pee, blown the hair off the keyboard, repaired the chewed up mouse cable and spent 10 minutes sighing while silently cooing to yourself about how cute he/she is, you might be ready to start.