My dog Rocket threw up twice, once 2 days ago and again today. The first time he threw up, he threw up 2 big pieces of a pig ear (my dad gave him and our other dogs them as treats). Today he threw up again, but it wasn't as bad (it was his food) so I'm assuming he's eating too fast. He seems normal, but ever since we got our other dog, he has a tendancy to eat faster. Any suggestions?