If both you and your Pet are ranked on the Tagged or Hi5 leaderboard, you’ll have the option to buy that Pet back multiple times while still maintaining ownership. This allows your Pet’s Value to increase, as well as your Assets (Cash + Total Pet Values).

If the Buy Again button does not show on your Pets page, it means that either you or your Pet are not currently Ranked, and thus the feature is not available.

For all 'Buy Again' transactions:

Each time you buy that Pet again you’ll simply pay the difference between the current value and the new value, instead of the whole value of the Pet. As always, the profit is split between the owner and the Pet.

Hint: To take full advantage of this feature, it is best used when both Pets are buying one another to maximize benefits. This means each player’s Cash and Assets will increase through game play!