At the beginning of the story, Rainsford's attitude is fairly cold toward the animals that he hunts.
Rainsford loves hunting, and he feels no sympathy for the animals that he hunts and kills. While Rainsford and Whitney are both on the boat, Whitney states that he believes that the jaguars that they are about to hunt have feelings. Rainsford dismisses the idea as nonsense, but Whitney persists that at the very least the animals must know fear.
"Even so, I rather think they understand one thing -- fear. The fear of pain and the fear of death."
Rainsford again responds by saying that the concept of animals having feelings is nonsense.
"Nonsense," laughed Rainsford. "This hot weather is making you soft, Whitney. Be a realist. The world is made up of two classes--the hunters and the huntees. Luckily, you and I are hunters."
Rainsford, as a hunter, doesn't even consider how his actions might make his prey feel. But once Rainsford becomes Zaroff's prey, Rainsford realizes exactly how all of the animals that he previously hunted most likely felt.
In Rainsford's conversation with Whitney while they are on the yacht bound for South America where they plan to hunt jaguars, the question arises about whether animals experience fear. Whitney contends they do, expressing some sympathy for the prey they hunt. Rainsford, on the other hand, disparages that view, declaring, "Who cares how a jaguar feels?" He enjoys hunting and he feels little if any concern about the animals. "The world is divided into two classes--the hunters and the huntees," he says. "Luckily you and I are the hunters."
Later, of course, when Rainsford becomes the hunted, his attitude changes. When he discovers "how an animal at bay feels," it's clear he's had a moment of revelation.
Rainsford attitudeis sceptic. He wrote books on hunting and likes hunting but he totally disagrees with the other guy about hunting people.