My puppy is almost 9 weeks old. He was seen at the vet, on Tuesday (initial puppy checkup). They called on Weds. to tell us that he had a parasite in his stool. We picked up treatment and gave his 1st dose Wednesday afternoon. He has been acting totally fine. Except, tonight. He has been crying to go out, often. He has had diarrhea and blood in his stool (just started, tonight). I am so worried!