The Food and Drug Administration not only has an intensive approval process for drugs for animals that’s similar to the approval human drugs undergo, but the FDA performs additional studies on drugs for food-producing animals not required for human drugs to be sure meat, milk and eggs are safe for us to consume, and that the drugs are safe for the environment. This process is intended to ensure public health.
Comparing animal and human antibiotic use is complicated. That’s why the proper context is so important.
Antibiotic resistance, bacteria that evolve to the point they are not easily killed by antibiotics, is a scientifically complex subject and a concern for human and animal health. A new online resource does an excellent job explaining antibiotic resistance.