Doxycycline for Young Children (after tick bite)?

I always wondered if a single dose of doxycycline after a tick bite would be all that risky for children under 8 as far as tooth staining goes. Well, I missed this two year old information from The Medical Letter:

“Lyme disease, unlike Rocky Mountain spotted fever, is seldom fatal and can be treated with antibiotics other than doxycycline. A single dose of doxycycline is recommended for prophylaxis after a tick bite. Given the CDC’s statement about its safety, it would seem reasonable to use doxycycline for prophylaxis in all age groups. When longer treatment courses (10, 14, or 28 days) are recommended for the various clinical manifestations of Lyme disease in children <8 years old, alternative antibiotics generally could be used instead.”

https://secure.medicalletter.org/w1497e