Is there any possible other explanation for breaking or bending biscuit whiskers other than having the bow out of tune?

I was told by an archery shop employee that they break and bend when the bow is drawn. Basically the arrow is bending from being torqued while drawn..

To me, I would think that the knocking point or the rest location would be the cause and solution..

Thanks.

Your summation would be the same as mine. Although there is sometimes downward pressure on an arrow when releasing from the string the arrow should still cleanly pass through the rest if the tune is right.

your whiskers shoudl never break if they are and its bending you are way out of tune.