French Bulldogs will feel hot when the temperature reaches 25 degrees in summer, and they will suffer from heat stroke when the temperature reaches 30 degrees. French Bulldogs with mild heatstroke will have symptoms of reluctance to move, loss of appetite, and drooling; French Bulldogs with severe heatstroke will have symptoms of vomiting, high fever, and body convulsions. When raising French Bulldogs at home, be sure to cool them down and do not expose them to high temperatures to avoid heatstroke.