String dogs generally don't die easily for a month. Pay attention to keep them warm and give them proper food in winter. The life span of a leash dog is closely related to its weight. Generally speaking, the greater its weight, the shorter its life. Under normal circumstances: a string of 0.9- 13.6 kg, with a life of 15- 18 years; A string14.5-36.2kg life 1 1- 14 years; 37.1-68kg string with life span of 8- 13 years; A string weighing more than 68kg has a life span of 7- 1 1 year.