1. 
   Molera
   A molera is a "hole" in a Chihuahua`s head; it is the same as a fontanelle in human babies. Historically, the Chihuahua as developed in Mexico and the United States has displayed a "hole in the head". In times past, this has been accepted as a mark of purity for this dog breed, and it is still ment...
   Found op http://en.wikipedia.org/wiki/Molera
   
   
2. 
   Molera
   Incomplete, imperfect, or abnormal ossification of the skull.
   Found op http://www.apluspetgoods.com/petsupplies/dog-glossary.php
   
   

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