Butler- Different Darts

“Oh dear,” said Butler, the phrase sounding over-delicate in his gravelly voice. “That must really have hurt.”

He reached into his pocket for the dart gun. “I’d better lend a hand, or at least a dart.”

Butler had been busy with his darts. Two night workers lay unconscious on cots at the rear of the hide.
...

“It’s the female creature,” he stated. “Making some kind of sound. It’s riling these animals up. I’m a bit disturbed myself.”

Artemis did not take his gaze from the lemur. “You know what to do,” he said to his bodyguard.

Butler knew. If there is an obstacle preventing the completion of a mission, remove the obstacle. He strode quickly to the bars, poked the pistol’s muzzle through the mesh, and put a dart into the female’s shoulder. She stumbled backward, her fantastic orchestra of animal sounds squawking to a halt.

Butler felt a shudder of guilt, which almost caused him to misstep on his way to Artemis’s side. Twice now he had tranq’ed this girl, or whatever she was, without having any idea what the chemicals were doing to her nonhuman system. His only consolation was that he had loaded small dosage darts as soon as he had secured the night watchman. She shouldn’t be out too long. A few minutes tops.

-The Time Paradox, Chapter 7