Classical selfish human ethics.
If we eat cute animals, we run several risks -
- Being called evil and regarded as immoral by other people who think they'll be looked upon favourably by others because they defended cute animals.
- Feeling guilty because we destroyed a cute animal.
Ugly animal consumption carries neither of these risks, and often delivers a larger portion. Also, because we like to keep ugly animals at a distance on farms rather than in suburbs, we don't have as much contact with them. This means most people care less about the ugly animals, because they're too busy stroking their
cats and dogs.