The annual breeding cycles of the fighting bull can be divided in the following way:
Breeding of the fighting bull
MATING
Each breeder has a different planning of Mating and thus about the birth seasons which are spread across the year following a Gauss Bell method between the months of July and Jun of two subsequent years focusing on winter months. The breeders plan for the birht date of the calves making them match times where the climate is less adverse and in which there´s plenty of availability of natural resources. Mating is carried out in Mating lots, often by natural mating during which a stud lives with a lot of cows in a pen for a certain amount of time.

BIRTH
The breedign year comes from July 1st of a year to June 30th of the following year. The Birth(The time since the first calf is born to the last birth in that timeframe) goes more like natural years as most of births take place in winter months.
Births take place in a natural way in their natural habitat: The plains. When the cow is urged with birth, seeks refuge in a place further away and protected. When the calf is born, the cow eats the placenta not to leave a trace and the calf is licked out by its mother to stimulate its bloodstream circulation and breeding. When the calf manages to stand, it sucks maternal milk from the cow which will protect the calf from infection the first months of its life.

BREASTFEEDING
First weeks: The mother presents an extraourdinary maternal instinct. The calf communicated himself through moos and copies all its reactions.
Fourth of fifth week. The calf starts eating grass and water and its digestive system starts to develop.
From the 5th week on; The calf feeding needs increase as a rumiant or mult-stomach(four stomach.A partir de la 5ª semana: Se incrementan las necesidades alimenticias del becerro como animal rumiante o poligástrico (4 estómagos: Reticulum, Rumen, omasium and Abomasium) and thus the mother´s milk production drcreases, so does the calf reliance on her.

COUPLING
The coupling means matching the calf with the cow, proceeding to a supervised identification by veterinarian technicicans from the Family Tree for its registering in the Fighting Bovine Breed Family Tree.
The calves have to be identified first, individually marked by crotals in the ear.
Weaning: Separation of the calf from the cow, performed when the calf is six or seven months old.

BRANDING
Branding means the individual and definitive form of calf identification when they are separated form teh ows. Its performed between 7 and 12 months into the calf´s live controlled by the Family Tree veterinarian and with the optional presence of the inspector of the family tree being the presence of the MAPAMA inspecting veterinary just optional.

REBREEDING
After the branding the animals are separated in groups of age and sex until the trial or shipping time comes. In the rebreeding stage, the calf continues its growing, starts defending itself and develop territoriality and hierarchy. Feeding at this point is crucial for the animal´s development.
Añojo (1-2 years):
- Infantile behaviour.
- Development of the rumiant digestive system.
- Hormonal changes. In males, development of the secondary sexual features.
Eral (2-3 years):
- Group behaviour it blends in with others.
- Horns start to grow.
Utrero (3-4 years):
- Muscular and bone development.
- Sexual games and fights.
- Relatively quiet behaviour, moving slower and eating for hours.
Cuatreño (4-5 years):
- Full grown animal: More lonely as time goes by.
- Plenty of food. Quiet character but for moments of tension.
- They fight among them.
- Group hierarchies defined.
- Large Muscle and fat layer development.
TRIALS
Trials are field operations to test bravery and bullfighting abilities of the heads of livestock. It´s carried out afeter the Taurine season, between the months of Autumn and Spring and the scenery is the trial bullring located at the breeding farm, in which lancing is done by horse and trial spear. It is a crucial test to select the next in line reproductive animals(Male/Female)
Male Trials.
Traditionally tests of harassment and knock over have taken place. They are carried out on horseback. An eral herd is set apart from the rest and they start harassing and knocking and after that they are tried by the trial horse, which is taunted by hand or using a stick. If the test is successful it will be later tried with the cape. In that case the animal cannot be taken to the bullring.
Female Trials.
The task is different as the ful herd of erales is tried(Exceptionally so are utreras) in the trial bullring of the real estate, using tauting cape, lancing horse and cape.
The trial phase is the most important operation of a fighting bovine breed as the breeder will decide which animals are approved as studs and in doing that he´s choosing the future of the breeding farm.

HEALTH CONTROL
Health control is carried out yearly, being specially relevant those done within the erradication and sanitation national program. Furthermore we have to point ou vaccinations and revaccinations for Blue Tongue. Each breeder checks the shire´s indigenous diseases very closely, being also vaccinations and parasite removal specially relevant.
Las curas derivadas de las cornadas que se originan entre las reses de las explotaciones suponen por un lado un elevado coste económico para el ganadero, y por un control veterinario exhaustivo.
SORTING OUT
The sorting is a countryside traditional task in which personnel from the farm go about on foot or on horseback to set some specimens apart from the others with different purposes.
SHIPPING
Selected and sorted buls are herded into the farm´s facilited to be shipped on board a truck in individual cages to be taken to the plaza, This is carried out in the dead of night.