Today a local farmer gave me a black angus bull calf--2-3 weeks old. It appears to have scours and runny eyes/nose. I am also concerned because his backside and base of his tail are wet and covered with small 1/2 inch thin grey worms. I see them in the diarrhea as well, so my assumption is that these arre intestinal worms. They don't look like maggots. I had some pyrantel pamoate (for worming dogs) and in desperation gave it to the calf. I should know in a few days if this works or not. I am curious if the worms in the hair along the backside will also die off, or do I need to somehow bathe the cow to get rid of the external worms? Any suggestions would be helpful.