I tried out their on-line service because I had a health question about my dog. The site claimed that the questions are free and payment is based on a "honour system"and is not required. They also offer a 30-day free trial. As usual, these sites require a credit card. This should be a red flag right away! Anyway, I noticed two unauthorized charges of $15 from my Paypal account. Not cool!!! Watch out for these guys. By the way, they did answer my question and did do a pretty good job of it.