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 size of horses varies by breed, but also is influenced by nutrition. Light riding horses usually range in height from 14 to 16 hands (56 to 64 inches, 142 to 163 cm) and can weigh from 380 to 550 kilograms (840 to 1,210 lb).