He is about 2yrs old and now have bloody diareia (how ever you spell it) I think he has Hematochezia but I am not sure. He still eats a lot, and no weight lose so I don't think he has Parvo

Take him to a vet. Find out for sure what the problem is, and get an effective remedy.

A 2 year old should have had enough parvo shots to be immune. Lethargy is another key symptom of parvo.