Domesticated animals — Reading Notes

Pig Intelligence and Social Behavior

Shaler devotes considerable space to the pig, arguing that its intelligence is underappreciated. He notes that pigs form defensive circles when attacked by dogs, with heads outward and stout tusks ready. This coordinated behavior, he suggests, stems from their gregarious nature and omnivorous diet, which together promote mental development. The author also describes how pigs in different regions adapt their foraging: in the western and southern United States, they wade into streams to catch crawfish by turning over stones; along the Bay of Fundy, they learn to retreat from the incoming tide. These examples serve to illustrate the pig's capacity for learning and environmental adjustment.

The Puzzle of Maternal Mania

A striking passage concerns sows that kill their own young shortly after birth. Shaler reports that one of his own sows destroyed three consecutive litters; another Berkshire sow would allow suckling only if she did not see the piglets. He attributes this behavior partly to confinement in pens, which prevents the sow from recognizing the young as members of her species, and notes that the mania is inherited, being common in Berkshire pigs but rare in other varieties. This observation is presented as a perversion of natural instincts, more frequent in isolated conditions than in herd settings. Shaler does not offer a definitive explanation but treats the phenomenon as a puzzle worthy of scientific attention.

The Limits of Selective Breeding

Throughout the excerpts, Shaler contrasts the potential of domesticated animals with the actual practices of breeders. He remarks that no effort has been made to develop the pig's latent mental capacities through selection, despite the species offering the best opportunity for an intellectually advanced domesticate. This critique extends to other animals: specialized breeding, he implies, often neglects cognitive traits in favor of physical characteristics. The author's perspective is that of a scientist who values intelligence and adaptability, and who sees room for improvement in how humans shape their animal companions.

Readers approaching Domesticated Animals should expect a work that ranges from the dog to the honeybee, but the excerpts suggest that Shaler's most vivid writing occurs when he focuses on a single species in detail. His willingness to include personal anecdotes and regional variations gives the text a grounded quality. Those interested in the history of animal behavior studies will find here an early attempt to understand animals as thinking beings, constrained by both biology and human management.

Reading Shaler’s notes on maternal mania in sows, I recalled watching our old barn cat pace her newborn litter, half-wild with worry. That same fierce, anxious tenderness. Years later, the shimmering descriptions in Living lights — Themes and Context gave me that identical ache—how protective instincts glow in strange, quiet ways, lighting up ordinary evenings with something unnameable.