I take this opportunity to add to the definitions of colleagues Danilo Enrique Noreña Benítez, Javier Gómez and Pedro Lozano that the origin of the word 'vicera' or 'vecera' as "cattle of different types and / or different owners that the viceros took to graze in turns", comes from "from occasion, per time", which in some regions of Spain is said 'de viz'. And precisely because the neighbors of a village took turns to take goats, cows, mules and even their own and others' pigs to graze in the pastures every day.
In the town of Borobia (Soria) bordering on Aragon, the vicera was also related to the community grazing of mountain cows, resulting also the same procedure of collecting cows, such as goats, in the morning and taking them to the village in the afternoon, in which each animal went only to the owner's house; The shepherd brought in his backpack the kid if he had given birth to the goat. There were two different viceras, each with its shepherd goatherd or cowboy. The call was made with a bagpipe from the top of the hill of the castle, in the center of the town, first the cowboy and then the goatherd always. There was another equal grazing for the mules of the town for when they did not have to work, which in this case is called "gluttony"
