Although the Jews were commanded just to make the tapestries from goats wool, some women that were talented to spin the wool while still on the goats back did so, because it produced a better tapestry, understanding that that’s the reason Hashem blessed them with that talent. In addition they cut off the wool and made the tapestry as a cover before building the walls, so not to cause discomfort even to an animal.

לקו״ש טז