Essay 3-A man brings in his sick cat that ate a dead mouse. Dr. Snyder tells the owner to wait a day to
see if the cat gets better on its own. If it is still sick, Dr. Snyder will prescribe antibiotics. The vet says, "I prefer not to prescribe antibiotics. They kill all kinds of good bacteria in the digestive system, not just the ones causing the infection." What role does good bacteria in an animal's digestive system? And why would killing all the bacteria in an animal's digestive system cause problems?