Donkeys require a diet high in fiber but low in protein and sugar, making hay or straw ideal for their daily consumption. Typically, a donkey should consume approximately 1.5% to 2% of their body weight in dry forage, such as hay or straw, daily. This means for a standard adult donkey weighing around 400 pounds, they would need about 6 to 8 pounds of hay or straw each day. It's important to adjust quantities based on the individual donkey's activity level, health, and body condition.