Tim grabbed the box, looking for something that could turn him back. Instead, Saul snatched it out of his hands. "Let me see it, I've always been good with puzzles." Turning it over in his hands, he pointed to the gemstone with the symbol for a man on it. "Maybe this will do it."
"Great, let me try!" shouted Tim, reaching his hands out.
"No way, I've got it!" Saul went to pull the box back, but Tim's finger had already reached the man stone, the claw catching in the setting and pulling it free. The gem bounced along the floor, Tim and Saul grabbing for it.
Tim managed to close his paw-like hand around it first, grinning at Saul. Pressing the stone back into the setting, he said, "We'll to it together, okay?"
"Assuming it'll still work." Saul turned the key while Tim held the stone. Scott had already wandered off to pleasure himself, and if this worked they could always turn him back the same way.
A click sounded from the lock, and the box's top popped open. Only this time, a pink cloud puffed out into the faces of the two foxes.
"What the?" Tim removed his hand from the box to rub his face, which was starting to itch.
"You idiot, you had the stone in backwards! Look!" Saul pointed at the stone, now displaying the symbol for "female".
"I can't see anything right now, that cloud got me right in the face! I think I inhaled some of it."
"If you did, so did I." Saul shivered for a moment. "Ack, I feel funny."
"Same here, my whole body's starting to tingle." Tim started scratching at his chest with a free paw. "Ooh, that feels nice."
Saul just stared at him. "You're growing breasts!" Looking down, he added, "And so am I!"
Tim started to rub his enlarging nipples, his other paw slipping down to his crotch, scratching at the fur around the base of his shrinking cock. He moaned softly, not even bothering to respond to whatever it was that Saul had said as he sunk down to the floor.
Saul tried to shake Tim's shoulder to snap him out of it. "C'mon, we gotta get that stone back in place!" He didn't even notice one of his own paws absentmindedly scraching at the fur around his own sheath.
"Yeah, just give me a minute. Oooh..." Tim's sheath and balls had shrunk to almost nothing, his testicles pulling up inside of him to become ovaries, his empty sack bunching up to become a pair of feminine lips. The tips of his fingers brushed his, no, her slit as she scratched. She let out a gasp of pleasure and started to slip a clawed digit in.
Saul was starting to lose interest in the box himself, as he felt a warm pleasure in his groin. Looking down between his growing breasts, he realized he'd been stroking his rapidly shrinking canine penis. He wanted to stop himself, but for some reason his paw just kept going. As he watched his crotch become a mound just like Tim's, his other paw started rubbing his new breasts, teasing the nipples. He, now she, closed her eyes at the sensations as her new slit was invaded for the first time by her own fingers, helpless to stop it. She, too, fell to the floor as her legs gave out from the pleasure.
As they lay there on the floor, pleasuring themselves, their figures shrank to become more feminine, thighs becoming smoother under the fur and their waists slimming down a bit. As their breasts grew to a somewhat large size, the changes stopped. Both of them didn't even seem to notice, too wrapped up in exploring their new bodies.