BREEDING CATTLE FOR FATTENING introduction The evolution of red meat production between 2010 and 2012 was marked by a balance between supply and demand expressed, resulting in a average increase of 1% per year to reach 350,000 tonnes. According to the breeding strategy developed for the 2020 production Red meat should see a improvement in a higher rate (1.16% per year) to reach 440,000 tonnes in 2020. Faced with this situation, the sector including red meat production Cattle should know an important development based on a transformation of existing livestock fattening units providing better sound productivity and therefore improved consumption through lower cost of the Kilogram of meat produced. The present study aims to highlight the profitability of a breeding bulls under 100 rational. The example given to test three fattening rations. I.1 TECHNICAL I.1Selection of animals The number is 100 fattening bulls per year divided into two bands of 50 bulls each. The dates of entry and exit of animals will be determined depending on market conditions. The choice of the age and weight at the entrance to the studio is a fattening capital can influence the profitability of farming. Indeed, it must theoretically increase in parallel with the feed efficiency. So, the goal is to optimize feed efficiency through appropriate choice of the age, weight and technical conduct of the workshop, which choice is dictated by the parameters related to th evolution of animal growth: weight and daily weight gain. 2: Evolution of the theoretical weight of the animals The first up to puberty in which the potential of growth is high. During this phase the average daily believes increases with time. The second after puberty where growth decreases. The daily believes decreases with time. That is why it is recommended to opt for:
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