bozur nasr, we have been working for almost 40 years from the 1960s to here, you said the growth of a broiler that took 120 days, chicken, bird, etc. you see, a broiler chicken that has been eugenicized in 70-80 years, a 40-gram chicken will gain 40 times its weight in 40 days. well, this means that humans have done eugenics for the benefit of producing the protein they need, but the world of genetics is not that simple. you bring a gene, you bring it up, so to speak, and you express it. resistance to diseases in this category of animals that undergo genetic modification , so to speak, it is defeated , this gene is no longer a template gene, so we have it in birds or our industrial cattle are much more susceptible to disease than traditional cattle. now, our sarabi or sistani cattle are much less sensitive to the disease compared to holstein cattle, which is a modified breed. industrial towns now , for example, a cow that stays in the town does not get sick, it does not transmit disease, but a cow that is not inside the town is not like this? mr. dr. management unit management unit. p