Traditional occupational therapy models provide a strong foundation for understanding the relationship between a person, their environment and their occupations. However, assistance animal practice introduces a unique consideration that requires further expansion of occupational reasoning: the presence of a living animal as an active participant within the occupational system.

Unlike most assistive technologies, an assistance animal is not a passive intervention applied to a person’s environment. The animal has its own needs, preferences, capabilities, limitations and welfare requirements. The success of an assistance animal partnership therefore depends not only on whether the animal can perform trained behaviours, but whether the interaction between the person, animal, environment and occupation creates meaningful and sustainable occupational outcomes.

The Person–Environment–Occupation–Animal (PEOA) framework extends traditional occupational therapy reasoning by recognising that assistance animal partnerships occur through the dynamic interaction between four interconnected elements:

• the person;
• the environment;
• the occupation;
• the animal.

This framework supports occupational therapists to move beyond a task-focused approach and consider the partnership as a complex occupational relationship.

Moving Beyond the Person–Environment–Occupation Model

The Person–Environment–Occupation (PEO) model proposes that occupational performance occurs through the relationship between:

• the characteristics of the person;
• the demands and features of the occupation;
• the environment in which participation occurs.

A good fit between these elements supports successful occupational performance, while a mismatch may create occupational barriers.

This model remains highly relevant to assistance animal practice.

However, unlike many interventions considered within occupational therapy, an assistance animal is not simply an environmental modification or piece of equipment. The animal itself influences the occupational system.

For example, two people with similar occupational goals may have very different outcomes with an assistance animal because of differences in:

• lifestyle;
• home environment;
• communication style;
• sensory preferences;
• routines;
• expectations;
• relationship compatibility.

Similarly, two animals trained to perform similar tasks may have very different suitability depending on:

• temperament;
• motivation;
• physical capability;
• stress responses;
• individual preferences.

The animal therefore becomes an additional component requiring consideration.

The Animal as an Active Participant, Not a Tool

A fundamental principle of the PEOA framework is recognising that the assistance animal is an active participant in the intervention.

Traditional assistive technology is generally designed to perform a function for a person.

An assistance animal, however, participates in a relationship.

The animal:

• communicates;
• responds to the environment;
• experiences stress and fatigue;
• develops preferences;
• requires care;
• requires opportunities for normal behaviour.

This means the occupational therapist must consider not only:

“What can this animal do for this person?”

but also:

“What does this partnership require from the animal?”

Ethical assistance animal practice requires balance between human occupational outcomes and animal welfare.

A partnership cannot be considered successful if the person’s goals are achieved at the expense of the animal’s physical or emotional wellbeing.

The Person–Animal Relationship

The relationship between the handler and assistance animal is central to occupational performance.

Unlike many interventions, the effectiveness of an assistance animal depends partly on:

• trust;
• communication;
• understanding;
• consistency;
• mutual adaptation.

The person must learn to interpret the animal’s behaviour and needs, while the animal learns the expectations of the working relationship.

This reciprocal relationship means assistance animal practice involves more than task acquisition.

A dog may technically perform a trained behaviour, but the partnership may not be successful if:

• the person and animal are poorly matched;
• expectations are unrealistic;
• communication between partners is ineffective;
• the animal experiences excessive stress.

The PEOA framework therefore supports a broader understanding of success.

Success is not simply:

“The animal completed the task.”

Success is:

“The partnership enabled meaningful occupational participation while maintaining positive welfare for the animal.”

The Environment Within Assistance Animal Partnerships

The environment is particularly important in assistance animal practice because the animal must function across multiple contexts.

The occupational therapist considers:

• home environments;
• workplaces;
• education settings;
• community environments;
• transport systems;
• social contexts.

An environment that supports one assistance animal partnership may not support another.

For example, considerations may include:

• available space;
• household routines;
• other animals;
• community accessibility;
• workplace expectations;
• support networks.

The environment influences not only the person’s occupational performance but also the animal’s ability to work safely and comfortably.

Occupation as the Purpose of the Partnership

Within the PEOA framework, occupation remains the central focus.

The purpose of an assistance animal is not simply for the animal to perform tasks.

The purpose is to support meaningful occupations.

For example:

An assistance animal retrieving an object is not valuable because retrieval itself is important.

It is valuable if retrieval enables the person to:

• prepare meals independently;
• participate in education;
• complete work tasks;
• manage daily routines.

Similarly, a regulation-related task is not meaningful simply because the behaviour looks impressive.

It is meaningful if it supports participation in valued occupations.

The occupational therapist therefore maintains focus on:

What occupation does this support enable?

Applying the PEOA Framework in Clinical Reasoning

The PEOA framework assists occupational therapists to consider:

Person

Who is the individual?

What are their:

• goals;
• strengths;
• preferences;
• abilities;
• support needs?

Environment

Where does participation occur?

What environmental factors:

• support success;
• create barriers;
• influence sustainability?

Occupation

What activities and roles matter?

What participation outcomes are desired?

Animal

Is the animal:

• appropriate for the role;
• physically and behaviourally capable;
• supported to maintain welfare?

Together, these considerations support a more complete understanding of assistance animal suitability.

Implications for Occupational Therapy Practice

The PEOA framework reinforces that occupational therapists should not approach assistance animals as simply another form of assistive technology.

Instead, assistance animals should be understood as:

• occupational partners;
• relational interventions;
• living supports;
• long-term commitments.

This requires occupational therapists to consider not only immediate functional benefits but also:

• sustainability;
• changing needs;
• animal welfare;
• long-term partnership outcomes.

Key Practice Principles

1. The Assistance Animal Is Part of the Occupational System

The animal must be considered alongside the person, environment and occupation rather than as a separate tool.

2. Occupational Outcomes Matter More Than Task Performance

A task only has value when it contributes to meaningful participation.

3. The Animal Is a Living Partner, Not Equipment

Ethical practice requires consideration of the animal’s needs, limitations and welfare.

4. Successful Partnerships Require Fit

The best outcomes occur when the person, animal, environment and occupations are compatible.

5. Occupational Therapists Must Consider Both Members of the Partnership

Human outcomes and animal wellbeing are interconnected.

6. Assistance Animal Recommendations Require Whole-System Reasoning

The PEOA framework supports clinical reasoning that moves beyond diagnosis and task lists toward sustainable occupational participation.

The Person–Environment–Occupation–Animal framework provides occupational therapists with a specialised lens for assistance animal practice by recognising that the intervention is not the animal alone, but the relationship between the person, animal, environment and occupation. This approach supports ethical, evidence-informed and sustainable assistance animal partnerships.