Riders mary there are no problem horses only problem riders has stood for twenty years as an indispensable text in its field as mary twelveponies writes in her introduction it is the hardest pill for all of us wouldbe horsemen to swallow but it is absolutely true if the horse is not responding properly we are doing something wrong there are no problem horses only problem riders bymary . There are no problem horses only problem riders has stood for twenty years as an indispensable text in its field as mary twelveponies writes in her introduction it is the hardest pill for all of us would be horsemen to swallow but it is absolutely true if the horse is not responding properly we. English and western riders there are no problem horses only problem riders has stood for twenty years as an indispensable text in its field as mary twelveponies writes in her introduction it is the hardest pill for all of us would be horsemen to swallow but it is absolutely true if the horse is not responding properly we are doing there are no problem horses only problem riders mariner books . There are no problem horses only problem riders by mary twelveponies is the best selling guide to horsemanship for english and western riders