The average pencil is about 8 grams in weight, the world's lightest adult dog, Ducky, is 1.8 pounds. I did some googling and I was wrong about how many balloons it takes to get a pencil off the air. The standard really shiny helium balloon has 14 liters of helium, and it just so happens that it takes one liter of helium for almost exactly one gram of something to be lifted up. So one balloon could lift up two really old and weathered pencils off the ground, but as for a dog like a Pomeranian (The dog in the gif) it would take TWO-THOUSAND-TWO-HUNDRED AND TWENTY-SIX LITERS OF HELIUM TO LIFT IT OFF THE GROUND. Thats a 162 balloons! HOLY SHIT. Even if the dog was underweight that's still DOZENS and DOZENS of balloons, still too many to even fit in that house! So yeah, it's fake. Thank you for forcing me to educate myself about balloons and helium, and thank you for your time.