From “The Fold”

“I have no idea,” Eban said. “My power is making people do things by planting the idea in their heads. I don’t know how I’m supposed to do that to a cow.”
“It’s a test,” Ky said. “She wants to see the limits of your power.”
“You think so? Hmm. I don’t think I can do that.”
“Have you tried?”…
“It’s not physically possible,” he said with a snort. “They don’t have hands.”
“No, but maybe you could make it easier for you somehow.”
Eban thought about it and nodded. “Relax,” he mentally told the cow. “Just relax and let me do all the work.”
Immediately, a thick stream of urine and feces issued from the cow’s back end, splattering noisily to the floor. Eban leaped back and covered his nose. Behind him, Ky laughed hysterically.
“Looks like it worked,” she exclaimed, clapping him on the back.
“That’s not what I was trying to do,” Eban said, coughing.
Ky laughed again then said, “Come on. Breakfast is ready.”
“Oh, yeah, I’m really hungry now,” Eban said and coughed again.