Their noses tip them off

As Becky tried desperately to inch her way forward, one of the Gnolls gave another commanding bark, and both immediately climbed down from their towers, moving with an eager, animalistic speed. They were like ravenous dogs that had just been thrown a steak.

They made their way straight toward the invisible girl, their noses held high in the air. As they got closer, Becky could see their canines sticking out ever so slightly from their mouths, jutting up as though to emphasize their animalistic nature.

The Gnolls closed in on her, getting closer and closer, their noses leading the way. Becky did her best to move away, feeling deeper into the cave, but they didn’t have to worry about trying to hide, and moved far, far faster than she did. Before she knew it, they were on top of her. One of the Gnolls sniffed her, once, then twice. It’s cock twitched, a small drop of pre-cum oozing out of the tip and rolling along its length. Then, it lunged.

The Gnoll slammed into Becky knocking her into the dirt, the potion dispelled. Becky tried desperately to scramble to her feet, but the Gnolls were both far stronger and faster than she could ever hope to outrun or fight. It was over. She had been caught.