Dobby does them five times a day at home.
Hulk might look like he would eat you whole, but this massive 18-month old, 175-pound pit bull is actually one of the nicest dogs you will ever meet, according to his owners.
Marlon Granna and his wife Lisa run Dark Dynasty K9s in New Hampshire, a kennel that breeds and trains pit bulls to be used as protection for a number of clients including the police and the government.
But even though Hulk and the other animals are trained to be ruthless guard dogs, he lets the couple's 3-year old son cuddle up and play with him.
"They're dogs, just like any other dog," says Lisa Grannan. "No matter what the breed, it's all completely on how you raise them."
A video of Hulk being weighed on a scale went viral last month and is now at over 7 million views, and in addition to the Barcroft TV feature above, he recently made a trip to New York to do the media rounds with "Good Morning America" and "Inside Edition."