Her calf chewed plants during the first week of life. It would reach up to its mother's mouth and sample what she was eating. This is a perfectly normal reaction. When the stress is unusually severe or prolonged, however, the body becomes oversupplied with these secretions. Damage in the form of some disease may result.
Balance of trade is to ordinary citizens an academic and remote question.
They judge prosperity by what they experience, feel, and see. The bones of a large species of extinct bird called the moa are found only in New Zealand. They could not fly. They disappeared about four hundred years ago. One poetry magazine pays only a very modest price per line for poems accepted for publication.