We have killed numerous vacuums in the 12 years my dog has been with us. We have yet to kill the Shark which we have had for close to 4 years. Dog is a mix -Chesapeake, Border Collie and Malamute. It's the Malamute undercoat that is the cause of emptying the container at least 3 times for one room and the hallway. the Shark is the best vacuum we have had.