Cat Open Fontanel: Understanding the Soft Spot on Your Cat's Head

TL;DR: An open fontanel is a "soft spot" on a cat's skull that usually closes with age but requires protection from trauma and monitoring for neurological signs. While generally not an emergency, seek immediate veterinary care if the spot is bulging or if your cat shows behavioral changes.

What is an open fontanel and what causes it in cats?

An open fontanel is a physical gap in a cat's skull where the bony plates have not yet fused together. This creates a "soft spot" on the top of the head, similar to what is seen in human infants. While most kittens are born with these gaps, they typically close as the kitten matures. In some cases, particularly in certain breeds or due to developmental delays, the spot may remain open into adulthood.

Is an open fontanel a medical emergency for my pet?

The urgency level for an open fontanel is typically Low. On its own, a soft spot is not a medical emergency; however, it does mean the brain has less protection against physical trauma. You should seek veterinary advice if the soft spot is accompanied by:

• Visible bulging at the site of the fontanel.
• Neurological symptoms like circling or pressing the head against walls.
• Seizures or sudden behavioral changes.
• The condition can otherwise be monitored during your next routine vet visit.

How does a photo of my cat's head help with veterinary triage?

Providing a clear, overhead photo of your cat's head can be incredibly helpful for a veterinary triage team. A photo helps the medical team to:

• Visualize the exact size and location of the fontanel.
• Check for visible swelling, redness, or skin abnormalities in the area.
• Establish a photographic record to track whether the gap is shrinking as your kitten matures.