I recently have been diagnosed with depression and my psychologist has recommended taking Buddy when travelling for work. I am against taking anti-depressants and this seems like a great alternative, but he is not comfortable writing a letter for me. Has anyone used esadoctors.com? A friend of mine recently got a letter from them and he has been able to travel with his 70 pound black lab. I have heard of fake registration services and I am scared of spending a lot of money for nothing.