In Martiko ducks's breeding develops at farms scattered by Navarra's mountains of the north.

In liberty and in complete nature, his nutrition composed by corn, he has a duration of four months, in addition to qunce days of fattened intensive.

At the end of this fattening period, the duck's various parts, they destine to consumption in cool air, thus like to different elaborations, join their, the more select as from the liver, the one that shows at foie's block duck's gras itself is .