You can redeem your Gift Card online in 2 different ways:
1)Redeem During Checkout under Payment Information, OR
2)Adding the Gift Card to your Account for future use under Payment Methods.
Redeem During Checkout — When you get to Payment Information during the checkout process, click on the “Gift Card” option. You’ll be asked to enter the 10-digit code on the back of the card:

Back of Santa Cruz Animal Health Gift Card

Back of UltraCruz® Gift Card
You will need to enter the amount you want to apply towards your purchase. The code and amount applied can be verified during Order Review and will also be noted in the final Order Confirmation. Any remaining balance on the card will be saved in your account for future purchases.
Adding the Gift Card to your Account — In the top menu bar of our website, click on the account drop down menu and select Payment Methods. Select the “Gift Card” tab button. You’ll be asked to enter the 10-digit code on the back of the card (see above image for code location). Once the code has been typed in, click the “Add Gift Card” button. The card’s number and available balance will be stored in your account and ready to use as a payment option when you are ready to check out.