Here's why:
* All horses are mammals. Mammals are warm-blooded animals, meaning they regulate their own body temperature internally.
* The terms "warm-blooded" and "cold-blooded" are outdated. They are no longer used by scientists to categorize animals.
* The terms were originally used to distinguish between horses bred for different purposes. "Cold-blooded" horses were typically draft horses, known for their strength and calm temperament. "Warm-blooded" horses were typically lighter breeds used for riding and racing.
Modern classification of horses:
Horses are classified by their breed, which is determined by their ancestry, physical characteristics, and temperament.
In summary, there is no biological difference between "warm-blooded" and "cold-blooded" horses. The terms are historical and have no scientific validity.