I don't know much either, Judy, it all gets quite confusing, that's why I go to the library so much and try to learn about so many things. I don't have any books at home about it right now, I could check some out if you'd like? My memory isn't too good, I know I read about it, I just can't get everything straight! Don't know if I'll ever have all my ducks lined up in a row! I guess if they were all sedated, maybe? lol