if you look at the position of her hand, without the cake shes literally giving the "give paw" command. thats why the dog gave its paw out to her hand thinking thats what it had to do to gain the treat. obviouslly the dog didnt process the problem of the treat being IN the hand he is giving paw to. hence the hilarious incident
You can feed a dog raw meat. IF their stomach is used to it. There are diets out there which purely give the dogs raw meat and they're really healthy.
But you can't give a dog who is used to typical wet or dry dog food a huge hunk of raw meat and expect them not to have digestive issues. It's all about getting their body used to the food so that they won't vomit it back up.