I was wondering if daschunds break their legs easily I herd they do is this true?

I think if it was any special problem, I would have heard more about it. I have heard about plenty of back trouble. Best way to reduce back problems is to keep the dog lean. To do that, evaluate the dog's body condition and adjust its food exercise as needed. See this guide, http://www.puppychow.com/products/popup_body_condition.aspx

In the book Daschunds for Dummies they mention that it is not good to have them jump off high objects... stairs, chairs, beds for example... because of the possibility of injuring their backs and legs. But breaking of the legs is not specifically mentioned.