Here's a couple of thoughts.
If the head was bigger it would be heavier and require stronger neck muscles to keep it usable, this would probably unbalance the horse, which is an eating/running machine.
A bigger head would also (probably) be less streamlined, and horses like to run.
Here's a couple of thoughts.
If the head was bigger it would be heavier and require stronger neck muscles to keep it usable, this would probably unbalance the horse, which is an eating/running machine.
A bigger head would also (probably) be less streamlined, and horses like to run.
Nobody can "make" them look a certain way. Evolution, for some reason, made them develop that way.