Is he waving at me?
Your hamster may seem to be waving hello, but he’s really exploring with his senses. Since he doesn’t have good eyesight, he relies on his senses of smell, hearing touch and taste. To do that, it helps to stand on his hind legs and wave his front paws a little.
Hiss, hiss or stay away
As you may have guessed, a hissing hamster is not a happy hamster. In this case, he’s feeling aggressive or is afraid. Take it as the warning it is and leave him alone for a while.