Question

why antibiotics are even mixed with the feed of livestock and poultry​

Answer 1

Answer:

Antibiotics have been used in animal feed for about 50 years ever since the discovery not only as an anti-microbial agent, but also as a growth-promoting agent and improvement in performance. Tetracyclines, penicillin, streptomycin and bactrican soon began to be common additives in feed for livestock and poultry.

Hope it's helpful uh♡♡

Answer 2

Answer:

The food-producing animal and poultry industries have undergone a dramatic change that began around 1950. What was an extensive industry became extremely intensive: units increased in animal concentration, both physically and numerically. Utilization of the beneficial responses of feed-additive antibiotics in improved growth and feed efficiency developed concurrently with the intensification of the animal industry. It has been proposed that feed-additive antibiotic usage was an integral part of this revolution in animal-production technology. It is estimated, at present, that 40 percent of the antibiotics produced are used for feed additives. Estimates allocate 0.5 million kg to the cattle industry, 1.0 million kg to poultry, 1.4 million kg to swine, and 0.4 million kg to other animals such as companion animals.

The animal producer can obtain antibiotics in the form of balanced supplements and premixes that are processed and sold by the feed-manufacturing industry.