Thanks for everybody's input. I noticed yesterday that Henry didn't bother DB after I yelled and scolded him so much the morning before. He hates to be yelled at more than anything. I'll be home more starting this weekend so I can watch them more. When Henry does show aggression towards DB I'll separate them.
Sara - I briefly read the article you suggested. When I have some quiet time I want to look at it closer. It sounds like part of our problem.
Love-a-hero - Henry is a spoiled child in an old man's body. I've thought about finding a younger horse with an attitude but with my luck they'd both pick on DB