Not all sources give four hours as the guideline for priapism occurring: The duration time of a normal erection before it is classifiable as priapism is still controversial. Ongoing penile erections for more than 6 hours can be classified as priapism..
Guinness World Records (London, England) Considering that the average lifespan of a chicken is generally no more than seven to eight years, Keith and Donna contacted Guinness World Records on July 30, 2001, to make them aware that Matilda was eleven years old and still in excellent health.
The average lifespan of a chicken varies, usually between 5 to 7 years -- though there have been cases of chickens that have greatly exceeded this, even beyond 20 years. Although there is no truly reliable way to tell a chicken's exact age, there are some indicators which can give you a rough idea.