3 days ago he vomited multiple times. The 2nd day he would vomit shortly after eating. He seemed fine throughout the day, I fed him yesterday morning as usual, and he sleeps in a kennel while I'm at work. He didn't vomit while I was gone- there was no sign of it in his kennel. However, after we fed him dinner, he vomited. I figured he was really hungry because his stomach was growly so last night a few hours after vomiting his dinner, I fed him half a piece of bread. It seems as if his stomach digested it. He didn't vomit again until early this morning. It was like a thicker yellow consistancy. He has gotten to the point now where he won't even try eating his dog food (We feed him dry food, science diet nature's best) His disposition hasn't changed a whole lot, when it's time to eat, he gets excited as usual, otherwise he's usually got a pretty laid back attitude. He usually sleeps on a sofa downstairs under a blanket a good majority of the day. You can see in his eyes however he does look like he feels sick/ and or sleepy. He's about 4 years old, and a min pin. He isn't an outside dog, we keep him indoors at all times and he's litter box trained. We have another min pin, a girl that is 3. On the very first day she vomited too, so at first we thought it was because we gave them new treats this week. They are the green bones (an off brand, but like a greenie) That first day their vomit was green like the treats. However, the girl is fine, and his vomiting has not stopped.