I am reading a fascinating book on dog behavior and training.  Here is an interesting piece :

Xenophon (circa 380 B.C.), a student of Socrates, wrote a valuable tract on dog training entitled Cynegeticus.

Xenophon recognized the value of early training and recommended that a dog’s education be started while it was still young and
most eager to learn. During the early stages of training, hare-hunting dogs were trained to drive fleeing prey into snag nets by feeding the dogs near the location of the nets, at least until they developed a sufficient appetite for the hunt itself to perform the task of coming to the nets without such aid. Young trailing dogs were placed on long leashes and paired up with more experienced dogs to hunt hare.

As their training progressed, novice dogs were restrained until the hare was out of sight and then released to ensure that they relied on scent rather than sight to follow and locate the fleeing prey. If a puppy failed to trail an animal in the correct direction, the puppy was recalled and the procedure repeated until the behavior was mastered (Hull, 1964).

Xenophon  also anticipates with surprising accuracy a number of modern training theories and techniques. Although
Thorndike has been credited with the discovery of the law of effect, stating that behavior is strengthened by reward and weakened  by punishment,  Xenophon enunciated this basic rule of animal training well over 2000 years ago in his essay On the Art of Horsemanship:
Now, whereas the gods have given to men the
power of instructing one another in their duty
by word of mouth, it is obvious that you can
teach a horse nothing by word of mouth. If,
however, you reward him when he behaves as
you wish, and punish him when he is disobedient,
he will best learn to do his duty. This rule
can be stated in few words, but it applies to the
whole art of horsemanship.