They have no instinct for that.

They have only a _capacity for its development_.
_Instincts and Capacities_.
It may, perhaps, be maintained that there is no real difference between instincts and capacities, and it certainly is possible that they may pass into each other by insensible gradations.

Still, practically, and in reference to our treatment of any intelligent nature which is in course of gradual development under our influence, the difference is wide.

The dog has an instinct impelling him to attach himself to and follow his master; but he has no instinct leading him to draw his master's cart.

He requires no teaching for the one.