Hamsters are solitary, so they probably wouldn't get on very well. Don't give them any fuss if they do. It's a slow process to make them know they are not allowed to jump up. Try bending down to greet them, and if they behave then make a big fuss of them. No it's not true.
Dogs are sometimes sick after eating grass.
In the wild, dogs eat grass as a food supplement. Ours eat grass all the time. I would be a dolphin. Here is Emma and Joe Inglis with a final word. Keep watching the shows, keep an eye out for the Christmas Special.