Curtice Brothers is the tomato case, I think. It's about specific performance (the court orders it). Our injunction unit had Van Wagner (holding unique qualities allow for specific performance, though damages will suffice in that case), and Lamley v. Watkins (holding specific performance generally not ordered in personal service cases, as the court can't follow up on it).
For the cow, I'm guessing it's the famous mutual mistake case, Sherwood. The two parties think the cow is barren, whereas, in actuality, it's pregnant. Whoops.