My dog ​​3 days with diarrhea does not eat. And in the stool has blood

She probably has parvovirus it's very very bad for dogs that are not vaccinated. Does she have the parvo vaccine? Signs and symptoms of canine parvovirus include the following: Bloody diarrhea (often severe) Fever. Lethargy (lack of energy) Loss of appetite. Malaise (discomfort associated with illness) Rapid weight loss.

it's worms

I thought they only take them at 2.

Take him in there early in the morning and he will get an emergency appointment with the vet