What is the meaning of a change of pasture makes fat calves?

The phrase "a change of pasture makes fat calves" suggests that introducing variety or new experiences can lead to growth and improvement. In a literal sense, changing the grazing area for livestock can provide them with better nutrition, resulting in healthier, fatter calves. Metaphorically, it implies that exploring new opportunities or environments can foster personal or professional development, leading to greater success and well-being.