The Dog in the City: Adaptation, Conflict, and Neurobiology of Urban Existence Introduction: The Urban Environment as an Evolutionary Challenge The city represents an extreme, highly stressful environment for the dog (Canis familiaris), whose phenotype and behavioral patterns were formed under radically different conditions. The modern metropolis with its noise, crowding, unnatural surfaces, rhythm, and abundance of prohibitions is a powerful factor affecting the animal's physical and mental health. The study of the urban dog requires an interdisciplinary approach, including ethology, veterinary medicine, psychology, and urbanism, to understand the mechanisms of adaptation and minimize the risks of maladaptive behavior. Sensory Overload and Cognitive Stress The urban environment is a constant assault on the dog's senses, whose sensory system is substantially different from that of humans. Acoustic stress: The dog's hearing is 4-5 times sharper than that of humans. Constant background noise (traffic, construction, crowd noise) is in the range of 60-90 dB, which for a dog is comparable to prolonged exposure to discomfort. This leads to chronic elevation of cortisol levels, sleep disturbances, increased anxiety, and exhaustion of the nervous system. Studies conducted in Berlin and New York show that behavioral pathologies related to stress are more common in dogs from central districts. Olfactory chaos: The dog's sense of smell is millions of times more sensitive. Urban air is filled with thousands of chemical compounds (exhaust fumes, road salts, perfumes, food odors), creating an "information noise" that makes it difficult to discern significant signals. This can cause frustration and reduce the effectiveness of one of the key channels of communication and understanding the world. Visual and tactile unnaturalness: The absence of natural landscapes, the prevalence of smooth, slippery, hot, or cold surfaces (asphalt, concrete, tiles, gratings) negatively affects the mu ... Read more