Representatives of Stranmillis University College have been advised to find an alternative to a merger with Queen's University "rather than flog adeadhorse".
Prof Mike Redmayne, a criminal law expert at the London School of Economics (LSE), told BBC News that "trying adead person would make as much sense as trying ahorse".
"We thought the horse was beaten when we saw a re-run and we would have settled for a dead-heat, " said Sheehy, who was celebrating his first Grade One win.