While dogs can vary greatly in size depending on the breed, Great Danes are commonly known to be one of the largest. Reaching a minimum of 30 inches tall and weighing up to 120 lbs, Great Danes can grow to a size you really wouldn't expect. It can be pretty surprising to see one playing among smaller dogs, but the breed is known to be one of the kindest you can have. In fact, they are known to love attention and constantly seek out affection from their owners. The need for affection can sometimes lead to jealousy. Jealousy is common among humans, but you may be surprised to know it happens to our furry friends as well. In this video, one of the Great Danes starts to receive some affection from its owner, but what happens next is adorable.