Luis contracts with Greenfield to buy several of Greenfield's dairy cows. Greenfield delivers the cows, but Luis doesn't pay for them. Greenfield may be able to have his cows returned if he seeks the remedy of:

restitution

Explanation:

Based on the information it can be said that in this scenario Greenfield may be able to have his cows returned if he seeks the remedy of restitution. The law of restitution refers to the law of gains-based recovery in which the court forces the defendant to give up his/her gains/profit to the claimant in the court case. Which in this case would be Luis would be the devendant and Greenfield the claimant.