Note 23 — Chapter VII · ToC
Reading edition
It may be said with truth, that the average health and vigor of a wild herd is much higher than it would be if the feebler portion of the young were reared, as in a state of domestication, instead of being destroyed by the stronger, or perishing from hardship; but if close breeding be, of itself and necessarily, injurious, the whole herd should gradually fail, which is not found to be the case.