Xiao Zai held his breath. He didn't know if Chu Yun was asking because he genuinely didn't know or because he was trying to get under Xiao Zai's skin. He had an uncanny ability to do it, so Xiao Zai didn't put it past him.
He knew Chu Yun well enough by now to know he wouldn't let Xiao Zai leave without getting his answer.
He sucked on a fortifying breath and grit his teeth. "I go into rut on the full moon."
Chu Yun blinked up at him, those long curling lashes fanning down over his keen fox eyes, and then blinked again, his confusion mounting.
"Do all wolves go into rut on the full moon or just you?" His frown deepened. "Because that would be extremely unproductive, from an evolutionary standpoint."
Xiao Zai sighed. Of course that was what Chu Yun would focus on.
"No, but all wolf ruts are triggered by stages of the moon. Full moon, new moon, first day of the waxing moon, first day of the waning moon."