"Are [animals] not furnished with most feelings similar to our own? They indisputably evince in an eminent degree most of the same passions. Things which affect us, generally seem to affect them in the same way; and at least the following sensations and passions are common to both, viz. hunger, desire, emulation, love of liberty, playfulness, fear, shame, anger, and many other affections though they are destitute of the power of laughter. But little occasion have they to exercise such a faculty!"