Developer builds heat-stress tool for flat-faced dogs after French Bulldog collapsed on walk

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A developer created a web app called Banx Walk Safe after his French Bulldog, Banx, collapsed during a walk at Ledge Street Park in Nashua due to heat stress. The tool uses a location input to pull real-time temperature and humidity data, computes a heat index, and compares the thermal load on flat-faced versus longer-muzzled dogs throughout the day. French Bulldogs and other brachycephalic breeds are at higher risk of heat-related illness because their flattened facial structure limits their ability to cool down through panting. The developer noted that Banx's early warning signs — going quiet and walking calmly — were misread as normal behavior until the dog stopped moving entirely. Built with vanilla HTML, CSS, and JavaScript and deployed on Vercel, the app draws weather data from Open-Meteo and uses the NOAA/NWS Rothfusz heat index formula.

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