For ten points, name these animals which ride in the Kentucky Derby and neigh.
A poem titled after two of these animals says that they "after mutual salutes/Not only discours'd, but fell to salutes", that poem is titled "A Dialogue Between Two [of these animals]", and was written by Andrew Marvell. The protagonist of another work about one of these animals dies after shouting the name "Malabar!" and winning 70,000 pounds in a bet. In another work, the motto of one of these animals is (*) "I will work harder" as well as "Napoleon is always right", that animal is named Boxer. A D.H. Lawrence novel describes a "rocking" one of these animals. For ten points, name these animals which ride in the Kentucky Derby and neigh.
A poem titled after two of these animals says that they "after mutual salutes/Not only discours'd, but fell to salutes", that poem is titled "A Dialogue Between Two [of these animals]", and was written by Andrew Marvell.
horses [accepts stallions or mares]