Head to differentdog.com and click "Sign in." From there, select "Reset Your Password" and enter your email address. Hit the "Password Reset" button and if there's a subscription linked to that email, a reset link will be on its way to you shortly.
If the email doesn't show up, it's worth checking your junk folder first. Still nothing? Try again, making sure the email address is typed correctly.
If you're still stuck, our Customer Delight team are happy to help at feedme@differentdog.com or on 01952 456 850.