Verizon Wireless customers can get a free $5 Petco gift card this month through the Up Rewards program. Check your Bonus Rewards section in your Verizon app to see if you have the offer. You can use just one reward point to claim the gift card, which makes it basically free.
Verizon offers similar deals monthly, but it’s YMMV. Worth checking the app continuously for this or other offers. Let me know if you see it in your app.