First we need to understand that there are two types of skull shapes in chihuahuas now it used to be throughout the past many people preferred the deer head to ours this is the type you would see and I talked about commercials throughout the 90s and early 2000s that she was named Gidget and was from Santa Clarita California Gidget passed away in 2009 five years after Taco Bell discontinued that yo Quiero Taco Bell at in recent years.
The preferred head shape has shifted from the deer head to the Apple head in fact kkc requires that Chihuahua breed to have an Apple head and deer heads are disqualified from competition as they are not considered breed standard for chihuahuas so why does it all I have an Apple head the Apple head shape of course comes from the shape of the skull joella’s come from Chihuahua Mexico and have been immortalized in pottery and are dating back hundreds of years to the Toltec and Aztec civilizations.
So chihuahuas are terriers but were bred to especially be lap dogs the smaller the better in fact chihuahuas are the smallest recognized breed the breed standard says cheese should be between four to six pounds with such small bodies one particular feature that remains into adulthood is the molera the molera is the open soft spot at the top of a chihuahuas head.
it’s similar to a baby’s soft spot called a fontanel that closes up as a baby grows it helps the baby’s head push through the birth canal in the Chihuahua the skull has been bred down to such a small size that often is valera soft spot remains and never closes up this soft spot creates a sunken area on the top of a chihuahuas head and that dent is what gives the Chihuahua their distinctive apple shaped skull.
Don’t be alarmed a small to medium-sized soft spot is normal and in fact is viewed as a sign of breed purity owners must be careful knowing that the molera is susceptible to injury since to always have been bred to have an open fontanel there are occasionally those born with the fontanel that is too large and it actually can cause health problems such as brain damage or hydrocephalus but this is only on rare occasions and for the most part the open fontanel is not a health issue and in fact AKC breed standard stage that in Chihuahuas applehead may or may not have an open molera.
The one story I have heard over and over from Chihuahua owners is that their veterinarians don’t seem knowledgeable with open molera and cheese I have been told stories of that saying that their chihuahuas are not healthy because they have an unclothed skull it amazes me sometimes how otherwise professional and well educated veterinarians don’t understand the role the molera plays in chihuahuas it is a sign of purity and not the sign of a sick or injured dog.