Selecting an assistance animal should always be guided by its ability to safely and effectively perform the required role rather than its appearance, popularity or breed reputation. Although certain breeds are commonly used because they possess characteristics that often lend themselves to assistance work, no breed, colour or physical appearance guarantees suitability. Equally, animals should not be excluded solely because they do not fit common perceptions of what an assistance animal should look like.

A function-first approach focuses on identifying animals with the physical health, temperament, behaviour and motivation required to meet the functional needs of the handler while maintaining excellent welfare throughout their working life. This requires consideration of the individual’s capabilities rather than relying on assumptions based on breed or appearance alone.

For occupational therapists, understanding this principle supports evidence-informed recommendations and helps challenge common misconceptions surrounding assistance animals. It also reinforces the importance of matching an animal’s abilities to the occupational goals and functional requirements of the individual.

This topic explores why function should always take precedence over appearance, examines the limitations of breed stereotypes and discusses how assistance animals should be selected according to their capacity to perform meaningful disability-related tasks.

Function Determines Suitability

The primary purpose of an assistance animal is to perform trained tasks that reduce the impact of a person’s disability and support greater independence, participation and quality of life. Consequently, the most important question during selection is not “What breed is this animal?” but rather “Can this individual safely and consistently perform the required role while maintaining good welfare?”

Function refers to the animal’s ability to perform the physical, behavioural and cognitive demands of assistance work. This includes:

• learning and reliably performing trained tasks
• maintaining appropriate behaviour in public environments
• coping with unfamiliar situations and distractions
• working safely alongside the handler
• remaining physically capable of performing required tasks throughout its working life.

Selecting for function ensures that decisions are based on evidence and the needs of both the handler and the animal, rather than appearance or public expectations.

Appearance Does Not Predict Performance

People often associate assistance animals with particular breeds, colours or sizes. For example, Labrador Retrievers, Golden Retrievers and Standard Poodles are commonly recognised as assistance dogs because of their long history in guide dog and assistance dog programs.

While these breeds are frequently selected because they often possess desirable characteristics, appearance alone provides very little information about an individual animal’s suitability.

Two dogs of the same breed may differ substantially in:

• temperament
• confidence
• resilience
• trainability
• motivation
• health
• working ability.

Likewise, mixed-breed dogs or less commonly used breeds may possess all the characteristics required to become successful assistance animals.

Selection should therefore be based on objective assessment rather than assumptions linked to appearance.

The Limitations of Breed Stereotypes

Breed characteristics can provide useful information about general behavioural tendencies, energy levels and physical attributes. However, they should be viewed as guides rather than guarantees.

For example, Labrador Retrievers are often described as sociable and trainable, while Border Collies are frequently recognised for their intelligence and responsiveness. Although these characteristics may be common within the breed, considerable variation exists between individual dogs.

Similarly, assuming that a particular breed is unsuitable solely because of reputation may unfairly exclude animals capable of performing assistance work successfully.

Breed information should therefore inform, rather than determine, selection decisions.

Matching Function to the Intended Role

Different assistance roles require different combinations of physical and behavioural abilities.

For example:

• A guide dog requires excellent environmental awareness, confidence and mobility.
• A hearing dog requires strong sound awareness and responsiveness.
• A psychiatric assistance dog requires emotional stability, resilience and close engagement with its handler.
• A medical alert dog requires the ability to consistently recognise physiological changes and respond appropriately.

No single animal will be ideally suited to every assistance role. Selection should therefore focus on identifying individuals whose strengths align with the specific occupational needs of the handler.

Looking Beyond Public Expectations

Members of the public often expect assistance animals to resemble traditional guide dogs or assistance dogs. However, assistance animals come in many different breeds, sizes and appearances.

Selecting animals to satisfy public expectations rather than functional requirements risks excluding otherwise suitable candidates and may inadvertently compromise welfare.

Occupational therapists should help clients understand that the effectiveness of an assistance animal is determined by its training, behaviour and ability to perform disability-related tasks—not by whether it looks like a “typical” assistance dog.

Occupational Therapy Considerations

Occupational therapists should encourage clients to consider assistance animals based on their ability to meet identified occupational goals rather than breed popularity or appearance. Understanding the principles of function-first selection enables occupational therapists to support informed decision-making, challenge misconceptions and contribute to collaborative discussions with assistance animal professionals. By focusing on functional capability rather than aesthetics, occupational therapists can help promote partnerships that are effective, sustainable and centred on the wellbeing of both the client and the assistance animal.