Can a contract for the sale of a cow be voided if both parties were mistaken about a material fact regarding the cow's reproductive capabilities?

Hiram Walker & Sons agreed to sell a cow named Rose 2d of Aberlone to T.C. Sherwood for $80 on May 15, 1886. Both parties believed the cow to be barren at the time of sale. Before delivering the cow, Hiram Walker & Sons discovered that Rose 2d of Aberlone was actually pregnant. Upon this revelation, the defendants refused to complete the sale and deliver the cow to Sherwood.

In October, the cow gave birth, significantly increasing her value as a breeding cow to between $750 and $1000. This was substantially more than the $80 sale price agreed upon when the cow was thought to be barren. Sherwood subsequently filed a replevin action against Hiram Walker & Sons, seeking the return of the cow based on the original sale agreement.

The plaintiff initially filed suit in justice's court and prevailed. The defendants then appealed the decision to the circuit court of Wayne county. At the circuit court level, a trial was held resulting in a verdict and judgment again in favor of the plaintiff. Dissatisfied with this outcome, the defendants pursued a further appeal to the current court, presenting 25 assignments of error for review.

(Morse, J.)

Yes. A contract for the sale of a cow can be voided if both parties were mistaken about a material fact regarding the cow's reproductive capabilities. Mutual mistake about a material fact that goes to the substance of the agreement fundamentally alters the nature of the transaction and the consideration exchanged. The cow's ability to breed significantly changes its value and essential character, rendering it a fundamentally different subject of the sale than what was originally contemplated. When such a mistake affects the entire basis of the bargain, the contract becomes voidable. The thing sold - a barren cow - effectively did not exist, invalidating the very foundation of the agreement. This principle applies when the mistake is so substantial that it prevents the formation of a true meeting of the minds on the essential terms of the contract. In cases of mutual mistake about a material fact, rescission is an appropriate remedy to restore the parties to their pre-contractual positions. This approach preserves fairness and prevents unjust enrichment that would result from enforcing a contract based on fundamentally flawed assumptions. The materiality of the mistake is crucial - it must relate to a fact that forms the very essence of the agreement, not merely an incidental or minor detail. Here, the reproductive capacity of the cow was central to its value and the purpose of the transaction. Allowing rescission in such circumstances upholds the integrity of contract law by ensuring that agreements are based on accurate, shared understandings of material facts.

Dissent (Sherwood, J.) There was no warranty in the case regarding the quality of the animal. When there is no warranty, there can be no mistake of fact when neither party knew or could have known of such fact. The contract was absolute with no conditions attached, and the court should not alter it by interpolating a condition allowing rescission if the defendants were mistaken in their belief about the cow's barrenness. This decision upholds the principle of caveat emptor and maintains the integrity of contracts as written, without judicial interference based on subjective beliefs of the parties.