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!
As observed, the two kinds of horses that have a higher life expectancy than most others are ponies and draft horses. Many types of horses fall under these two categories, but normally, horses don't live more than 35 years.