What is heavier a horse or dog?

This is a tricky question! It depends entirely on the specific horse and dog.

* A large breed dog (like a Great Dane or Mastiff) could be heavier than a small pony.

* A small breed dog (like a Chihuahua) would definitely be lighter than any horse.

To compare, you'd need to know the specific breeds or even the individual weights of the horse and dog.