What it is
In a growing puppy, bone is constantly being laid down and reshaped. In this condition that process gets out of hand on the lower jaw and parts of the skull: new bone forms in rough, uneven layers, the jaw thickens and the surrounding tissue becomes sore. Where extra bone builds up near the jaw joint, the puppy may struggle to open its mouth wide.
It is considered an inherited disease and shows up while the puppy is still growing, at the age when its skeleton changes fastest. Bouts of pain and swelling can come and go, sometimes with a fever.
For you, meals may be the hardest part. A puppy with a sore jaw may eat slowly, give up halfway through, and lose interest in hard chews or tug games. Watching how much actually goes in, handling the head gently and being patient at the bowl all help while the jaw hurts.
Signs you may notice
- Reluctant to eat or chew
- Drools more than usual
- Swollen or thickened jaw
- Yelps when the head is touched
- Struggles to open the mouth
- Listless, feverish spells
You may notice a puppy that is reluctant to eat, struggles to chew or open its mouth, drools, or has a jaw that looks thickened or swollen. Some puppies run a fever, become listless, or yelp when the head or muzzle is touched.
When to see a vet
Book a visit if your puppy is eating less, drooling or seems sore around the jaw or head. A puppy that has stopped eating or cannot open its mouth needs to be seen promptly.
This is general information, not veterinary advice. For your own dog's health, tests and treatment, see a vet.