Chris owned and raced some greyhound dogs, who were very successful on the track. Bruce wanted to buy one of them and breed with it. However, when Bruce approached Chris, Chris told him his dogs were not for sale. Bruce increased the price he was offering but Chris continued to say no.

After several attempts Bruce finally said to Chris that he was being a stubborn ox and that dogs can easily die if one was not too careful with what they fed them.

Chris started to fear for the safety of his beloved animals and himself, so he approached another dog owner, George, and offered to sell all his dogs quite cheaply provided it was a quick sale. George agreed to the sale and now has the dogs.

Chris regrets his hasty decision and wishes to set aside the contract for the sale of his dogs. What legal argument could Chris make to set aside the contract for sale? Is it likely he will be successful?