We have a group of characters (in the oWoD) that stumbled upon a kinfolk played by another player. He now senses the rage of the changing breeds (two garou and a corax), otherwise known as the curse.

Since I'm not finding any mention of the Corax being subjected to the Curse, is there any mention in the rules that humans react the same way to the rage in a corax?
I know that the Corax induce a reduced delirium, so I'd house rule it, that the effect of the rage inside a Corax would have also a reduced effect on the humans.
Or isn't a Kinfolk affected by the Curse?