Will My Sampson Be One Of The Biggest Dogs In The World? [VIDEO]

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My cute little Sampson is about 9 months old right now. I thought he stopped growing, but I was wrong. He's over 6 feet tall when he stands up, but he's still just a pup at heart. He just chewed up my work out shoes. Other than a little chewing problem, he's the greatest dog ever. Super sweet, protective, and a cuddler. I'm just wondering: Will he get this big?  Maybe if I sing to him, give him a little watering and love?