Dog is sleeping lot and not eating?

When dogs throw up, sleep a lot, not eat, and not drink, they have parvo. I know because my dog Kozmo had parvo when he was young and it was too expensive to go to the vet everyday and get injections so my parents took the injections home and they did it themselves. He survived it, luckily. Most dogs get it when they are young but it is possible for them to get it when they are older. Good luck with you and your dog if they have it. (They can die from it.)