* Age: Young horses are lighter than mature adults.
* Sex: Mares are typically smaller and lighter than stallions.
* Breed: Some Thoroughbred lines are bred for larger size.
* Nutrition and Exercise: A horse's diet and exercise routine significantly affect their weight.
* Individual Variations: Just like humans, individual horses within the breed can have varying sizes.
General Ranges:
* Adult Thoroughbred Mares: 900-1200 pounds (400-550 kg)
* Adult Thoroughbred Stallions: 1000-1300 pounds (450-600 kg)
Important Note: These are just general ranges. It's always best to consult a veterinarian or experienced equine professional for specific weight recommendations for your individual horse.