Not exactly. If a mob were to catch on fire and touch a block of powder snow, **that** would melt the snow. Otherwise, no. Powder snow cannot catch on fire like wool or wooden blocks do.

@@TigersIGaming oh ok, thanks. I heard other farm comments saying that if your snow is near lava it can melt, but the mobs must be why. Thanks for explaining!

From the tests I've run, once you agitate the wither, even if you die, he still prefers to go after you instead of other mobs in the area. Also, the fight can take some time, but this method is mainly for those who may not have access to a lot of powerful weapons and gear.

Bows will only work for so long. The wither activates its projectile protection shield when its health reaches half, so bows become useless against it at that point.