Dog
The domestic dog represents 15,000 years of selective pressure for household compatibility. Dogs have evolved reduced fear responses to novel stimuli, extended juvenile behavioural patterns into adulthood, and digestive systems capable of processing the starch-heavy human diet. They recognise human authority structures, respond to training, and demonstrate an apparent willingness to follow rules they did not create.
A well-socialised dog can integrate into human domestic routines with minimal friction. They adapt to apartment living despite ancestral ranges spanning hundreds of square kilometres. They tolerate clothing, leads, and veterinary examinations. They have, in short, surrendered wildness in exchange for guaranteed meals.
Orangutan
The orangutan's domestic potential presents what ethologists term significant challenges. Adult males can weigh 130 kilograms and possess the strength to tear car doors from their hinges. They require vertical space measured in tens of metres and mental stimulation that exceeds anything a typical home can provide. Housing an orangutan legally requires permits available only to accredited zoological institutions in most jurisdictions.
More fundamentally, orangutans retain what researchers describe as complete autonomy of will. They cooperate with humans when cooperation serves their interests and refuse when it does not. Unlike dogs, they cannot be reliably trained through positive reinforcement alone. They make independent assessments of human requests and decline those they find unreasonable.
VERDICT
Dogs have been optimised for cohabitation through millennia of selection. Orangutans remain fundamentally wild animals that merely tolerate human proximity.