my puppy is puking blood.

Question
he is puking up small amounts of blood, but not when he pukes what he ate. the only time i see blood in it is when it is just siliava and this yellow looking stuff. can u help me?

Answer
If it's bright red blood you are seeing and a small amount, it could be just a ruptured blood vessel from his throat when he is vomiting. The question is why is he vomiting?
If he is young and is vomiting a lot and has diarrhea then he could have parvo and needs to see a vet right away. Left untreated, parvo is highly fatal.
So get him into the vet's today.