04 September 2008 11:13

I own a five-year-old Thoroughbred gelding who raced once when he was three. When I first started hacking him, aged four, he was brilliant, but now we can hardly get five minutes up the road before he gets very tense and starts spinning round to go home. Sometimes he even bucks and rears. When I turn back for home he jogs the whole way back. What should I do?