The 2012 Grand National winner Don't Push It has been retired to stud.
Don't Push It retires as a winner of eight of his 29 races - amassing around £750,000 in prize money for owner JP McManus.
"Don't Push It remains in good heart and looks a picture out in his field at the bottom of the gallops where he has lived with the sheep who have kept him company for a few years now," Jonjo O'Neill told the Racing Post.
"But he had not really been sparkling in his recent homework and the last thing we wanted to do was make him carry on doing something he was not really happy with.
"After speaking with JP and his racing manager Frank Berry we all decided the best thing to do was call it a day as he owes nobody anything after what he has done. He'll now be off to JP's stud for a long retirement.
"It will be not be easy to replace him in the yard and he'll be missed by everyone at Jackdaws Castle and, I am sure, the jump racing world as a whole."
Don't Push It, now 12 years old, won the famous Aintree race under the guidance of Tony McCoy.