The old excuse in the publications were that animals were like robots operating only on a mystical "instinct" and only "pretended" to have emotions to "amuse us." This was combined with "the animals didn't kill each other before Adam and Eve sinned."
Now that science has proven that lots of primates, aquatic mammals, dogs, and even animals that some people eat in the Western world, like pigs, have a full range of pain, emotion, and sentience, and that animals killed each other millions of years ago, the publications have been completely silent on the subject. Add that to the long list of "this was disproven so we'll ignore it."