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.
There really is no good way to accurately determine the age of a chicken. In general, from hatch to feathering takes up to 12 weeks. First eggs are laid at about 5 months. First molt (the lose and change feathers) takes place at about 12 to 14 months old depending on the breed. Egg production stops about three years old and from there the chicken can live up to 10 years old.