S bought an add-on for the gerbil cage and an exercise ball for Gerald when we were up in the big city yesterday.
We thought this was the safest way to introduce Gerald to The Dog since The Dog likes disposing of Gerald's distant cousins. The Dog sniffed around the ball for a bit then he tried to pounce on it.
We think it is best if Gerald's future exercise sessions take place while The Dog is outside. Gerald agrees!