Melissa McCue-McGrath, CPDT-KA is a Boston dog trainer with 15 years experience in sports, manners & behavior. She wrote Considerations for the City Dog and contributes to NPR's Car Talk FIDO blog and Maine Dog Magazine. She's the co-Training Director of NEDTC, the oldest AKC obedience club in the US.
Don't worry about the Mayans. This should clear up the common misconception:http://www.gocomics.com/nonsequitur/2009/12/07