Acoustic stress in domestic dogs (Canis familiaris) living around football stadiums

Football matches, as a common urban activity, produce high levels of noise because of vehicular traffic, screams, whistles, and firework displays. Fear of noise is one of the most commonly reported behavior problems in dogs (Canis familiaris); however, few studies have focused on the effects of repeated exposition to noise in these animals. Here, we investigated whether the noise produced during football matches may act as a stress source for dogs living near football stadiums. We measured noise levels on days with and without matches, in the surrounding neighborhoods of two football stadiums of Minas Gerais, Brazil: (a) Arena Independência (AI) and (b) Governador Magalhães Pinto (GMP). Noise measurements were carried out by using a sound level meter, in distances varying between 0 and 400 m from the stadiums. A structured interview was conducted to dog owners living nearby AI, about the dogs' characteristics, demographics, and behavior. Noise records of days with and without matches were compared, and questionnaires were analyzed (general linear models) to identify possible correlations between the reported changes in the animals’ behaviors on days with football matches and the distance these animals lived from the stadium. Higher noise levels were recorded on football match days than on days without matches, with a greater effect of these between 0 and 249 m (D1) than between 250 and 400 from AI. Around Governador Magalhães Pinto, we recorded greater noise levels on days without football matches compared with match days, with no difference between distances. Fear/anxiety behaviors were reported as more intense on days with football matches, in comparison with days without matches for 90.6% of the study dogs. The occurrence of matches made specific fear-related behaviors of the dogs—severe trembling, excessive salivation, agitation/restlessness, whining, and appetite loss—more frequent. The proximity of AI intensified the exhibition of general fear/anxiety behaviors and made intense trembling and excessive salivation more frequent at D1, in relation to D2. On the other hand, dogs living at D2 barked, howled, and lost appetite more often than those living at D1. Our results suggested a detrimental influence of noise from football matches on the behavior of dogs living around football stadiums. These data are relevant for public policy-making to promote preventive and mitigating measures, to improve the quality of life of both the dog and the human populations in the surroundings of football stadiums.