Early spaying causes the leg bones to grow unevenly. This leaves your dog more vulnerable to hip dysplasia and torn ligaments. Early spaying triples the risk of bone cancer, a deadly cancer that mostly occurs in large and giant dogs. Early spaying causes urinary incontinence in up to 20% of spayed females.
An average horse should live around 25-30 years old, that is if it is healthy. If you are lucky, your horse will live longer! The oldest horse was 62 years old! I have known horses to live for over 30 years! The oldest I have known was 32 and was still being used in a riding school for 1 hour a day!
The average size of a horse is approximately 15.2 hands. However, that's not the average for all horses in all breeds and disciplines. As the saying goes, Horses for courses, meaning that equines were bred for a certain size and a particular physiology to accomplish specific tasks.