Details:

Give One, Get One
The Give One, Get One Offer is valid on Petco eGift Card orders through December 25, 2016 at 11:59pm PST.
For every $ 50 worth of Petco eGift Cards purchased, the purchaser will receive one (1) $ 5 Petco eGift Reward Card.
The $ 5 Petco eGift Reward Cards will be sent to the purchaser after the order has processed.