Which of the following is a key finding from Pottenger's Milk Study regarding diet?

The key finding from Pottenger's Milk Study indicates that cats fed a raw diet exhibited the best health outcomes. In this study, Pottenger observed different groups of cats that were fed varying diets consisting of raw and cooked milk, as well as raw and cooked meat. The cats that consumed raw milk and raw meat showed superior health, remarkable vitality, and better overall physical and reproductive health compared to those on cooked diets.

This aligns with the broader understanding of nutrition in animals, where a raw, unprocessed diet tends to preserve essential nutrients and enzymes that can be degraded or lost in cooked foods. Pottenger's findings emphasize the importance of diet quality and the potential benefits of raw food, suggesting that natural diets can lead to improved health outcomes. Therefore, the conclusion that cats on raw diets showed the best health outcomes reflects the core findings of the study.