Log into your Stripe account from their website at www.stripe.com, and sign into your account. Next click on the Developers link in the right hand side of the main menu.

From the left hand menu click on the API Keys option, it should be the second option in the list.

From the API Keys panel copy the pk_live key that is visible on the screen, you will then need to go into your KennelBooker account and then go into the Settings page, and then click into the 'Online Payment Settings' page, and copy the value into the 'Stripe Publishable Key' textbox.