Which of the following animals is NOT known to primarily depend on high-protein hay?

Broiler chickens are primarily raised for meat production and have a dietary requirement that differs from ruminants like dairy cattle, sheep, and goats. While high-protein feed can be beneficial to broiler chickens, they do not rely predominantly on high-protein hay, which is typically more relevant for animals like dairy cattle, sheep, and goats that require high-fiber forage. These ruminants benefit from high-protein hay as it supports their complex digestive systems and overall health, aiding in growth, lactation, and reproduction.

In contrast, broiler chickens usually thrive on specially formulated feed that includes grains, protein sources, and other ingredients to promote rapid weight gain and a good feed conversion ratio. Their nutritional requirements are more aligned with energetic and protein-dense feed rather than fibrous hay. Thus, the emphasis on high-protein hay is not essential for the health and productivity of broiler chickens, making this choice the correct option.