Thematic Bible: Facts about breeding

And that day he took out the he-goats that were striped and spotted, and all the she-goats that were speckled and spotted, every one that had white in it, and all the black from among the lambs, and gave them into the hand of his sons. And he set three days' journey between himself and Jacob. And Jacob fed the rest of Laban's flocks. And Jacob took rods of green poplar, and of a fresh tree, and the almond and plane tree. And he peeled white streaks in them, and made the white appear which was in the rods. read more.
And he set the rods which he had peeled by the troughs, by the water troughs, where the flocks came to drink, across from the flocks, and the flocks were in heat when they came to drink. And the flocks conceived before the rods, and brought forth striped cattle, speckled, and spotted. And Jacob separated the lambs, and set the faces of the flocks toward the striped, and all the black in the flock of Laban. And he put his own flocks by themselves, and did not put them with the flock of Laban. And it happened when the stronger flocks conceived, Jacob laid the rods before the eyes of the flocks in the troughs, so that they might conceive among the rods. But when the flocks were feeble, he did not put them in. And usually it came to be, the weak ones were Laban's and the stronger ones Jacob's. And the man increased exceedingly, and had many flocks, and maidservants, and male servants, and camels, and asses.

If he said this, The speckled shall be your wages, then all the flocks bore speckled. And if he said this, The striped shall be your hire, then all the flocks bore striped. And God has taken away the flocks of your father, and has given them to me.