He chose to keep the amulet for his own advantage.
He dried it off, and put it back on his neck, and he felt tingly around his feet, so he took his shoes off to see what's happening.
He see's his own feet reshaping into somewhat of a dogs paws, and Jeff held his breath at the fear of yelling, and attracting his wife to come.
His feet still are the shape of a human's, but they're covered if gray fur, and have black pads on the bottom of them.
It now tingles around his Tail bone...