Having had some hands on experience, I bought the "In The Trenches" DVDs. They are helpful for learning how to trim foundered horses and as a reference to go back to if unsure how to proceed. Not sure if it's worth $90 though. They show worst cases, as in the "get the saw" to cut off toes that are so long that nippers won't do it. It's good though to watch him trim-the technique gets embedded in your brain after watching it over and over.