A werewolf's rut happened one to two times a year. It was mostly affected by the moon's movement, but also by a lot of other aspects such as the mental stability and physical condition of the said werewolf.
When the werewolf in question was heavily agitated or was experiencing extreme grief, the rut often came early. When it came, the werewolf went through intense pain. It was almost as if the pain in the heart manifested itself into a pain in the body and condemned the werewolf to endless torture.
Unless the werewolf got to unburden himself, he was going to suffer until his rut period was over. It usually took from three days to a week.
In such cases, the only person who could provide any sort of relief was the mate.
Judging from Ronan's condition, his rut must have started as soon as he returned home.
