A few years ago, the population of mountain goats was critically low, prompting wildlife experts to start a breeding program in a protected area. Since then, the population of mountain goats has quadrupled, and experts believe this number is sufficient for the species to survive in the wild. However, due to ongoing threats to their habitat, the experts plan to relocate the mountain goats 1,500 miles away to a region where the Rocky goats, a different species, thrive. The experts predict that this relocation will ensure the long-term survival of the mountain goats.

Which of the following, if true, challenges the experts' prediction?