Significant differences exist between dairy cattle and beef cattle due to selective breeding over time.

Dairy cattle have been selectively bred to have large udders and produce substantial amounts of milk for extended periods. As a result, their physical appearance may showcase a relatively slender frame with minimal musculature. However, the udder stands out as an area of overdevelopment, reflecting their milk production capabilities.

In contrast, beef cattle have been bred with a focus on developing muscle mass and achieving meat with marbled fat. An example is the Angus cow, which exhibits a sleeker and visibly stronger physique. All muscle groups appear more substantial compared to dairy cattle. Additionally, when comparing the udders of beef cattle like the Angus cow, they are designed primarily for nurturing and feeding their calves.

These distinctions arise from the deliberate selective breeding practices employed over time to emphasize specific traits in each respective cattle type.