Neck injury in dogs – symptoms, first aid and treatment

Overview

The skin does not reveal the full injury

A bite can tear, stretch, crush or detach neck skin and underlying tissues. Vital structures lie close together in the neck. A superficial-looking mark may therefore accompany a life-threatening deep injury.

Neck bites can involve laryngeal paralysis, tracheal perforation or air in the mediastinum, the space between the lungs. Air leaking into tissues beneath the skin causes subcutaneous emphysema. This finding prompts investigation of deep respiratory and digestive structures as well.

In laryngeal paralysis, the area around the vocal cords does not open normally during inhalation. This can partly obstruct the airway. The problem may be one-sided or bilateral.

Of 5 bite patients with laryngeal paralysis studied, 3 had bilateral paralysis. Two dogs had one-sided paralysis.

The hyoid apparatus supports the position of the tongue and larynx. During swallowing, the hyoid apparatus and larynx move forwards. The epiglottis simultaneously covers the laryngeal opening. Injury here can therefore affect swallowing as well as breathing.

Causes

A bite, impact or an object penetrating through the mouth

Biting and shaking by another animal can cause both penetrating neck wounds and injuries hidden beneath the skin. Bites introduce oral bacteria into the wound. A bite can also leave dead muscle tissue in a neck wound.

A blunt impact can damage neck structures without a bite as well. Significant trauma also prompts consideration of possible cervical spinal injury. Bone and nerve injury need their own investigation alongside soft tissue damage.

Chewing or retrieving a stick can cause a penetrating mouth and throat injury. A neck abscess can develop after such an injury, migrating foreign material or an external neck wound.

Swelling, nerve damage and airway narrowing

Laryngeal swelling and inflammation can impair breathing. A bite can damage a nerve controlling laryngeal movement. Laryngeal paralysis can therefore involve temporary or permanent dysfunction. The exact damage mechanism affects treatment choice.

Risk factors

Neck wounds have been reported to account for around 20–29% of canine bite injuries. In medium-sized and large dogs, the neck has been described as the most common bite wound location. The figure does not describe the frequency of all neck injuries.

In the group of 5 dogs with post-bite laryngeal paralysis, median age was 7 years, ranging from 2–13 years. Median weight was 11.2 kg, ranging from 2.2–24.6 kg. Severe airway injury was therefore not confined to one size category in this small group.

All 5 dogs were described as healthy before the bite accident.

Typical symptoms

Signs depend on the structure damaged. Possible observations include:

• Difficulty breathing or an abnormal inspiratory sound.
• Neck swelling and tenderness.
• Wound bleeding or blood-stained saliva.
• Difficulty swallowing and mouth pain, particularly after a penetrating throat injury.
• Excessive drooling, gagging or coughing.
• A neck lump or draining opening appearing later.

A neck abscess can involve fever, lethargy and loss of appetite. A vet may feel air beneath the skin during palpation. In one case, severe neck injury involved extensive bruising despite intact skin.

Restlessness and inability to walk have also been described in a dog with severe laryngeal and hyoid injury.

In the 5-dog laryngeal paralysis series, 1 dog was referred only after 5 days when general condition and breathing deteriorated.

Complications and consequences

Airway obstruction, bleeding and infection

Tracheal perforation or laryngeal dysfunction can impair breathing. A jugular vein can rupture after a bite. In the worst case, an untreated bacterial bite wound infection can lead to sepsis.

A large neck abscess can displace the trachea sideways. A neck abscess may require urgent placement of a breathing tube. Oesophageal damage is another possible consequence of a neck bite.

Laryngeal paralysis may be permanent

Post-traumatic laryngeal paralysis may be temporary or permanent. One dog still had unilateral paralysis at the 4-month reassessment. Scarring or local narrowing can develop at a tracheal surgical site. Apparently good breathing therefore does not always end injury follow-up.

Diagnosis at the vet

Examining the whole dog and airway function

Initial assessment covers airways, breathing, circulation and bleeding. Other injured areas are examined alongside the neck. Detailed wound examination often requires sedation and clipping the hair. A plan to secure breathing is made beforehand.

A dangerous neck injury is possible without neurological deficits. All 5 bite patients with laryngeal paralysis also had an otherwise normal neurological examination. The ability to walk therefore does not establish that the larynx, trachea or blood vessels are intact.

Imaging and endoscopy

Neck and chest X-rays may show subcutaneous air or air in the mediastinum. A hyoid fracture may also become visible. Ultrasound, CT or MRI can investigate a neck abscess or foreign body injury.

Laryngeal movement is assessed during endoscopy. The trachea and oesophagus can also be examined for damage. In the selected 5-dog group, 3 dogs had tracheal injury. One dog had an oesophageal injury. These proportions do not apply to every neck bite.

A wound discharging substantial pus can be cultured to select a suitable antibiotic. An older bite wound may also require culture and susceptibility testing. Blood tests assess blood loss and general condition, among other issues.

Among 82 dogs operated on for neck abscesses, foreign material was found during surgery in only 5 dogs, or 6%. Failure to find a foreign body therefore does not mean there was no deep abscess.

Treatment

Securing the airway and circulation

A dog with breathing difficulties may need supplemental oxygen before detailed investigations. Intubation, placing a breathing tube into the trachea, may be needed to secure the airway. Of the 5 dogs with laryngeal paralysis, 4 underwent surgery. Two of those needed a temporary tracheostomy for breathing. Pain relief forms part of bite injury treatment. Your vet selects care according to the injury and respiratory function.

Wound cleaning and corrective surgery

Neck wound treatment may include extensive clipping, cleaning, exploration and removal of dead tissue. A damaged blood vessel may need surgical closure. A tracheal perforation can be sutured closed. The procedures needed therefore depend on which neck structures are damaged.

Severe laryngeal and hyoid trauma may also require repair of torn muscles and bone fractures. A feeding tube can maintain nutrition during recovery. Use of a breathing or feeding tube requires individual care instructions.

A deep wound may initially be left open and closed only after the tissues are clean. A drain can direct discharge out of a cavity. A closed suction drain is unsuitable for an actively bleeding area or one leaking air.

Antibiotics often form part of bite injury treatment. Selection can be refined using bacterial culture and susceptibility testing. Medicines are prescribed by your vet.

Laryngeal paralysis treatment follows the signs

Laryngeal paralysis does not always need surgery if breathing difficulty is absent. Worsening breathing difficulty may, however, require surgical repair. Of the 4 operated dogs, 2 underwent lateral fixation of laryngeal cartilage to widen the breathing space. A small tracheal tear can sometimes be managed without repair surgery if the air leak is stable and breathing does not worsen. This decision requires veterinary examination and monitoring.

Hospital care and recovery outlook

In the group of 5 neck bite patients with laryngeal paralysis, hospital stays lasted 2–10 days. The 3 dogs examined after discharge had normal breathing and physical examination findings at 4–6 months. Owners of the other 2 dogs described respiratory function as excellent during telephone follow-up at 1–6 months. This small, selected series shows recovery is possible but does not provide a recovery percentage for all neck bites.

In a group of 82 dogs operated on for chronic neck abscesses, treatment succeeded in 92.7%. Recurrence was confirmed or suspected in 6 dogs, or 7.3%. These figures concern abscess treatment, rather than the outlook for fresh tracheal or blood vessel injuries.

In the same 82-dog abscess group, 4 dogs, or 4.9%, underwent another operation for recurrence. Surgical wound healing complications occurred in 9 dogs, or 10.9%. These required additional surgery in 5 dogs, or 6% of the whole group.

Prevention

Avoid free roaming and keep your dog under control on a lead outdoors. Do not approach an unfamiliar loose dog with your own dog. Basic training started young and controlled familiarisation with other dogs can reduce fighting situations.

Choose a suitable retrieving toy instead of a stick because a wooden stick can cause a penetrating throat injury. In a car, secure your dog in an appropriate safety harness or a secured crate. Do not attach restraints to a collar.

After a fight, check your dog for hidden bite wounds.

Important for dog owners

First aid and transport

Direct pressure with a clean dressing can be applied to a heavily bleeding wound. Protection around the neck or head must not restrict the airway or breathing. Do not muzzle a dog with airway obstruction. Allow the position your dog finds easiest for breathing. Arrange veterinary transport and report breathing difficulty or heavy bleeding in advance.

Monitor the wound, breathing and swallowing

After treatment, keep the wound clean and dry. Prevent licking according to the injury and care instructions. Redness, heat, discharge and pain are reasons to contact the treating vet. Thick or foul-smelling discharge and increasing swelling require assessment.

Report returning breathing difficulties immediately. Persistent swallowing difficulties or coughing are also assessed at follow-up. Follow the agreed feeding or tube-feeding instructions until the treating vet changes the plan. Avoid making changes to a breathing tube, drain or feeding tube yourself.

Frequently asked questions

Can a small neck bite wound be dangerous?

A dog's canine teeth can create a deep cavity beneath the skin. Airway injury is possible even without an obvious penetrating skin wound. A neck bite therefore needs veterinary assessment. Breathing difficulty, heavy bleeding or rapidly deteriorating condition are urgent signs.

Why can breathing become noisy after a neck injury?

Laryngeal swelling and inflammation can impair airflow. A bite can also damage the nerve controlling laryngeal movement. A paralysed larynx does not open normally during inhalation. Noisy or worsening breathing therefore needs immediate veterinary investigation.

Does every neck bite need surgery?

Treatment depends on the injury and respiratory function. A small tracheal tear can sometimes heal without repair surgery if air leakage does not increase and breathing remains stable. Worsening breathing difficulty may nevertheless require surgery. The decision follows investigations, rather than wound appearance at home.

Can a neck abscess appear only later?

A neck abscess can follow a penetrating throat injury, migrating foreign body or external neck wound. A chronic case may cause neck swelling or a draining opening. A later lump, fever or pain when swallowing therefore warrants another veterinary examination.

How is a neck wound cared for at home?

Keep the wound clean and dry and prevent licking. Report redness, heat, discharge or pain to the treating vet. Neck protection must not interfere with breathing. Individual cleaning, medication and feeding instructions are provided at discharge.