Show how Crusoe comes up with ways to save his first crop of barley from being eaten by birds and others animals before he harvests it?

To save the crop from hares:

"I set my dog to guard it in the night, tying him up to a stake at the gate, where he would stand and bark all night long; so in a little time the enemies forsook the place, and the corn grew very strong and well, and began to ripen apace."

As for the birds.....

"I immediately let fly among them, for I always had my gun with me. I had no sooner shot, but there rose up a little cloud of fowls, which I had not seen at all, from among the corn itself."

"I stayed by it to load my gun, and then coming away, I could easily see the

thieves sitting upon all the trees about me, as if they only waited till I was

gone away. And the event proved it to be so; for as I walked off, as if I was

gone, I was no sooner out of their sight but they dropped down, one by one,

into the corn again. I was so provoked, that I could not have patience to stay

till more came on, knowing that every grain that they eat now was, as it

might be said, a peck-loaf to me in the consequence; but coming up to the

hedge, I fired again, and killed three of them. This was what I wished for; so

I took them up, and served them as we serve notorious thieves in England,

viz., hanged them in chains, for a terror to others. It is impossible to

imagine almost that this should have such an effect as it had, for the fowls

would not only not come at the corn, but, in short, they forsook all that part

of the island..."