Stubborn farm animal

MULE

This hybrid offspring of a donkey and horse is known for its strong will and endurance.

The clue "Stubborn farm animal" points to "mule" because mules are known for their strong-willed, sometimes obstinate nature. They’re a hybrid of a donkey and a horse, often used on farms for their strength and endurance. The word "stubborn" directly hints at their reputation for being hard to persuade once they dig in their hooves.