The Wealth of Nations by Part 1 Chapter 11 Page 233

They were probably not unlike that stunted breed which was common all over Scotland thirty or forty years ago, and which is now so much mended through the greater part of the low country, not so much by a change of the breed, though that expedient has been employed in some places, as by a more plentiful method of feeding them.

Though it is late, therefore, in the progress of improvement before cattle can bring such a price as to render it profitable to cultivate land for the sake of feeding them; yet of all the different parts which compose this second sort of rude produce, they are perhaps the first which bring this price; because till they bring it, it seems impossible that improvement can be brought near even to that degree of perfection to which it has arrived in many parts of Europe.