My Dog Has Been Throwing Up For 3 Days. He Acts Normal Though. What's Up? He's 9 Years Old.

I would take him to the vet asap. He is going to get dehydrated with throwing up and diarrhea. Could have an intestinal flu/virus. Could be parvo...which is terrible and needs treatment NOW! Much sounds to me as if it is parvo. Only the vet can tell you. I am just giving you what I have seen being I have had dogs horses and cats all my life. Good luck to you and your pup. I know how important they are as if they are a part of the family.

He may have an obstruction or something. The thing is, if the vomiting and diarrhea continue, he is in danger of dehydration. I think that if this continues through today, you had better take him to the vet. Monitor his water intake, that is the crucial thing here. If he is not getting water, then he will get real sick and possibly die.