My first horse was one of those horse's and i could't bare to sell it on after it had been to too many homes and neglected and She was also too sweet at times to put down. After two years of work she became the best horse i could have asked for and would never sell her. She dies last year of old age. I don't think it is fair to say people should not even bother with a horse that can't be ridden or is naughty or difficult because a lot of horses have just had terrible owners and need time and patience. I was bucked, kicked and bitten but she was just doing what she had needed to do to survive other owners, once I worked with her she was amazing and I learnt SOOO much from her and she gave me so much confidence. I never accepted the behaviour as OK but i knew not to blame her and i channelled her thoughts to happier ones, she went from being uncatchable to running up to anyone, from galloping and no brakes to being ridden at walk,trot and canter with no gear on at all. I'm not saying every horse that is troubled is like this but they should be given a chance to show their true colours and not the bad habits or responses they have resorted to.