Open Fontanelle
Chihuahuas commonly have a persistent open fontanelle (soft spot on the skull) due to delayed or incomplete closure of the cranial bones.
Detailed Description
Unlike most breeds, Chihuahuas may retain a soft spot on the top of the head into adulthood. While often benign, it increases risk of brain injury and is associated with other congenital defects like hydrocephalus.
Common Symptoms
- Palpable soft spot on skull
- Usually asymptomatic
Management Options
- Protection from head trauma
Frequently Asked Questions
Is an open fontanelle dangerous?
Not usually, but increases risk of brain injury.
Will it close as my dog ages?
Often, but not always.
Should I avoid touching it?
Yes, avoid pressure on the area.
Is it related to hydrocephalus?
It can be associated, but not always.
Is this unique to Chihuahuas?
It is much more common in Chihuahuas than other breeds.
Condition Details
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Typical Age of Onset
Present at birth; may persist for life
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Testing Available
Yes
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Diagnosing Methods
Physical exam
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Preventative Measures
Avoid breeding dogs with large or multiple fontanelles
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Related Conditions
Hydrocephalus, Craniosynostosis