Home » Diseases » In dogs » Anacusis (Deafness)

Anacusis (Deafness) in Dogs

Occurrence: rarer
Location of illness: Head/Neck

Author: Dr. med. vet. Gisa Löwe | Last modified: 06.11.2025

Anacusis, also known as complete deafness, is a condition in which a dog can no longer perceive sound. It is a complete loss of hearing in one or both ears.

The most important facts at a glance

Anacusis, i.e. deafness in dogs, can be congenitalCongenital means "present from birth" and refers to characteristics or conditions that are already present at birth. This can include genetic disorders, developmental anomalies, or infections transmitted by the mother. or acquired. CongenitalCongenital means "present from birth" and refers to characteristics or conditions that are already present at birth. This can include genetic disorders, developmental anomalies, or infections transmitted by the mother. deafness is often genetic and occurs more frequently in certain breeds such as Dalmatians and Bull Terriers, often associated with coat colors. Problems can arise in various areas of the auditory system, from the external auditory canal to the inner ear, where hair cells convert vibrations into electrical signals. Acquired deafness can be caused by infections, injuries, or age-related hearing loss. Symptoms include no reaction to noises and Startle response / jumpiness.

The diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. begins with a medical historyThe medical history is the systematic collection of a patient's medical history through questioning. It includes information about previous illnesses, treatments, allergies, and lifestyle habits. and physical examination by the veterinarian. The BAER test measures the electrical activity in the brain in response to acoustic stimuli and helps to determine the extent of hearing loss. Imaging techniques such as CT or MRI can reveal structural abnormalities. In the case of Ear infections, an examination with an otoscopeAn otoscope is a medical instrument used to examine the external auditory canal and the eardrum. Otoscopy is a standard procedure in veterinary medicine for the diagnosis of ear diseases in dogs and cats. can be useful. Treatment options depend on the cause. Infections can be treated with medication, while genetic or age-related deafness is not curable. Here, the focus is on adapting training and communication via visual signals.

PreventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. focuses on avoiding infections through regular veterinary examinations and good ear hygiene. In susceptible breeds, responsible breeding practices are important to reduce genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases.. Research aims to better understand genetic causes and develop regenerative medicine to restore hearing. The quality of life of deaf dogs can be improved through special training methods and aids.

Causes

The hearing of dogs works similarly to that of humans. Sound waves are transmitted through the external auditory canal to the eardrum, which vibrates. These vibrations are amplified by the ossicles in the middle ear and transmitted to the inner ear, where the hair cells in the cochlea convert the mechanical vibrations into electrical signals. These signals are then sent to the brain via the auditory nerve, where they are interpreted as sounds.

Deafness in dogs can occur due to problems in any of these areas. It can be congenitalCongenital means "present from birth" and refers to characteristics or conditions that are already present at birth. This can include genetic disorders, developmental anomalies, or infections transmitted by the mother., meaning it is present at birth, or it can be acquired. CongenitalCongenital means "present from birth" and refers to characteristics or conditions that are already present at birth. This can include genetic disorders, developmental anomalies, or infections transmitted by the mother. deafness is often genetic, while acquired deafness can be caused by various factors, including infections, injuries, or age-related hearing loss.

A common cause of congenitalCongenital means "present from birth" and refers to characteristics or conditions that are already present at birth. This can include genetic disorders, developmental anomalies, or infections transmitted by the mother. deafness in dogs is the inheritance of certain genetic traits, often associated with coat colors or patterns. Breeds such as Dalmatians, Bull Terriers, and Australian Shepherds are known to be more susceptible to genetically determined deafness. This form of deafness is usually associated with a defect in the development of the hair cells in the cochlea.

Acquired deafness can be caused by a variety of factors. Ear infections that are not treated appropriately can damage the inner ear and lead to hearing loss. TraumaA trauma refers to a physical injury or damage caused by external force. Traumas can range from simple cuts to severe multiple injuries., such as a blow to the head, can also affect hearing. ChronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. ear infections that lead to thickening of the eardrum or the formation of scar tissue are also possible causes. In addition, the natural aging process can lead to degeneration of the hair cells in the inner ear, which is common in older dogs.

Symptoms

Very common symptoms:

Common symptoms:

Rare symptoms:

A dog with deafness often shows Behavioral changes that indicate hearing loss. A common symptom is the inability to respond to noises or commands. The dog may also be difficult to wake from sleep because he does not perceive ambient noises.

Another sign may be that the dog no longer listens to his name or does not respond to sources of noise that used to interest him. Some dogs with hearing loss also tend to Barking louder because they can no longer perceive their own volume.

Behavioral changes such as increased Startle response / jumpiness or Aggressiveness can also occur, as the dog feels insecure due to the lack of acoustic information. In some cases, the dog may also react excessively to visual stimuli because he relies more on his other senses.

Diagnosis

An important diagnostic test is the BAER (Brainstem Auditory Evoked Response) test, which measures the electrical activity in the brain in response to acoustic stimuli. This method is particularly helpful in determining the extent of hearing loss and in distinguishing between unilateral and bilateral deafness.

In addition, imaging techniques such as X-rays, CT scans, or MRI can be used to identify structural abnormalities in the ear or brain. If an ear infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. or other inflammatory conditions are suspected, an ear examination with an otoscopeAn otoscope is a medical instrument used to examine the external auditory canal and the eardrum. Otoscopy is a standard procedure in veterinary medicine for the diagnosis of ear diseases in dogs and cats. can be performed to assess the condition of the outer and middle ear.

Therapy

The treatment of deafness in dogs depends on the cause of the hearing loss. If there is a treatable underlying condition such as an ear infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease., the veterinarian will prescribe appropriate medications to combat the infectionAn infection is the colonization and multiplication of pathogens such as bacteria, viruses, fungi, or parasites in an organism, which often, but not always, leads to a disease. and reduce inflammation.

For genetically determined or age-related deafness, there is currently no cure that can restore hearing. In such cases, the focus of treatment is on helping the dog live with the hearing loss. This may include adjusting training and using hand signals or other visual cues to communicate with the dog.

Some dogs benefit from the use of vibration collars, which produce gentle vibrations to get the dog’s attention without startling him. It is important to provide the dog with a safe environment and give him time to adjust to his new situation.

Prognosis and follow-up care

The prognosis for dogs with deafness varies depending on the cause and extent of the hearing loss. For treatable causes such as infections, the prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. can be good if the condition is detected and treated early. Hearing loss can be partially or completely reversed if the underlying cause is resolved.

In the case of genetically determined or age-related deafness, the hearing loss is usually permanent. Despite the loss of hearing, many dogs can live happy and fulfilling lives if they are properly supported. Adapting to hearing loss requires patience and consistent training for both the dog and the owner.

Dogs that are deaf from birth often adapt better because they have never learned to rely on hearing. They develop stronger visual and olfactory skills to perceive their environment.

Prevention

The preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. of deafness in dogs focuses primarily on avoiding acquired causes. Regular veterinary examinations and good ear hygiene are crucial to detect and treat Ear infections early before they can cause permanent damage.

For breeds that are prone to genetically determined deafness, it is important to promote responsible breeding practices. Breeders should use genetic tests and not breed dogs that have known genetic predispositions for deafness. This can help reduce the risk of passing these genes on to future generations.

Owners of dogs should also make sure to check their pets’ ears regularly for signs of infections or Entzündungen and have them treated by a veterinarian if necessary. A balanced diet and a healthy lifestyle can also help promote the dog’s general health and prevent age-related health problems.

Outlook on current research

Research on deafness in dogs has made significant progress in recent decades. Scientists are working to better understand the genetic causes of deafness, as many cases of congenitalCongenital means "present from birth" and refers to characteristics or conditions that are already present at birth. This can include genetic disorders, developmental anomalies, or infections transmitted by the mother. deafness – that is, deafness present at birth – are due to genetic factors. Certain dog breeds show a higher prevalence of deafness, which indicates genetic predispositions. For example, Dalmatians, Australian Shepherds, and some Terrier breeds are more frequently affected. Researchers are identifying specific genes associated with deafness to help breeders make informed decisions and thus reduce the prevalence of this condition.

Another area of research focuses on the development and improvement of diagnostic techniques. Traditionally, deafness in dogs was diagnosed by observing behavior and simple hearing tests. Currently, however, the use of Brainstem Auditory Evoked Response (BAER) tests is being promoted, which allow a more accurate and objective determination of hearing ability. These tests measure the electrical activity in the brain in response to acoustic stimuli and are particularly valuable for early diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. in puppies.

In addition, regenerative medicine is being explored as a promising area for future treatments. Some studies are investigating the possibility of regenerating damaged hair cells in the inner ear, as the loss of these cells often leads to deafness. Researchers are experimenting with stem cell therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. and genetic engineering approaches to restore or at least improve the function of the inner ear. These innovative approaches could play a revolutionary role in the treatment of deafness in the future.

PreventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. measures are also an essential part of current research. Breeders and veterinarians are continuously informed about the latest findings in order to promote the avoidance of deafness through targeted breeding strategies. In addition, environmental factors that can contribute to the development of deafness are being investigated, such as certain medications or infections that occur during pregnancy or early in a dog’s life.

Another goal of the research is to improve the quality of life of deaf dogs. This involves investigating training methods and aids that help deaf dogs interact more effectively with their environment. These include visual signals as a substitute for acoustic commands and the use of vibrating devices that can transmit certain signals to the dog. These measures help ensure that deaf dogs can lead a fulfilling and safe life.

Frequently asked questions (FAQs)

How do I know if my dog is deaf? There are several signs that may indicate that your dog is deaf. These include a lack of response to noises, such as calling his name or clapping your hands. If your dog suddenly stops responding to noises that used to interest him, or if he is startled during sleep, this could be an indicationIndication refers to a valid reason or rationale for using a specific treatment, medication, or medical procedure. It is based on the diagnosis and the patient's clinical condition. of deafness. A veterinarian can perform a BAER test to make an accurate diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients..
Can all dog breeds be affected by deafness? Yes, all dog breeds can theoretically be affected by deafness, but there are certain breeds that have a higher prevalence. These include Dalmatians, Bull Terriers, Australian Cattle Dogs, and Cocker Spaniels. The increased prevalence in these breeds is often associated with genetic factors.
Is deafness curable in dogs? Currently, deafness in dogs is not curable, especially if it is genetically determined. Treatments focus on managing the condition to ensure a good quality of life for affected dogs. However, research into regenerative therapies such as stem cell treatments could open up new possibilities in the future.
Can a deaf dog live a normal life? Yes, deaf dogs can live a normal and fulfilling life. With the right training and aids such as visual signals or vibrating collars, they can function just as well as hearing dogs. It is important that owners are patient and consistent in their training and make the environment safe.
Can deafness in dogs be prevented? In some cases, deafness can be prevented, especially if it is caused by external factors such as infections or certain medications. In the case of genetically determined deafness, preventionPrevention includes measures taken to prevent diseases or injuries. In veterinary medicine, this includes vaccinations, parasite control, and health monitoring. is possible through targeted breeding strategies. Breeders can use genetic tests to exclude dogs with a higher risk of deafness from breeding.
How can I train a deaf dog? Training a deaf dog requires visual signals and physical gestures instead of verbal commands. Reward-based methods are particularly effective. It is also helpful to get a deaf dog used to wearing a vibrating collar to get his attention. Clear and consistent communication is crucial.
Are there special aids for deaf dogs? Yes, there are various aids that can make life with a deaf dog easier. These include vibrating collars that can give the dog signals, as well as special leashes that are tailored to the needs of deaf dogs. The use of lights and visual signals in the house can also be helpful to improve communication.
Is deafness inherited in dogs? Yes, deafness can be inherited, especially if it is genetically determined. Certain genes are associated with an increased likelihood of deafness, and dogs that carry these genes can pass the condition on to their offspring. Therefore, it is important that breeders integrate genetic tests into their breeding programs.
What role do environmental factors play in deafness in dogs? Environmental factors can also play a role. Infections, medications, or injuries that affect the inner ear can lead to acquired deafness. It is important to protect dogs from loud noises and to be aware of possible side effects of medications in order to minimize the risk of deafness.
How can I help my deaf dog feel safe? Safety is particularly important for deaf dogs. A safe environment without sources of danger is crucial. Use fences in the garden and make sure your dog is always on a leash when you go for a walk. Communicate clearly by using visual signals and make sure your dog always knows where you are to give him security.