The Five Freedoms framework (1979) defined animal welfare primarily in terms of freedom from negative states: hunger, thirst, discomfort, pain, fear, and distress. This framework has been enormously influential but has been criticized for its predominantly negative framing. A fully good life requires positive experiences — not just the absence of suffering.
The Five Domains model (Mellor & Reid, developed through multiple updates to 2020) expanded the framework to include positive mental experiences as a fifth domain alongside nutrition, environment, health, and behavior. The Five Domains explicitly recognizes that welfare involves providing opportunities for positive states (pleasure, contentment, engagement, positive social experiences) not merely preventing negative ones.
This conceptual shift has practical implications: welfare assessment protocols must measure positive states, not just count suffering events. This is both scientifically challenging and practically important.
Positive welfare states in animals include:
The judgement bias test, developed by Mendl, Paul and colleagues (Bristol Veterinary School), measures how animals interpret ambiguous stimuli — animals in a positive affective state interpret ambiguous cues more positively (optimistically). In the task, animals are trained that one stimulus (e.g., a bowl in one location) predicts reward, and another predicts no reward or a mild punishment. An ambiguous stimulus (intermediate location) is then presented — optimistic animals (in good welfare) respond as if expecting reward; pessimistic animals (in poor welfare) respond as if expecting no reward. This test has been validated in rats, pigs, sheep, chickens, bees, and other species.
Play ethograms — detailed behavioral catalogs of play behaviors — have been developed and validated for pigs, cattle, dogs, horses, and other species. Automated video analysis systems can now detect and quantify play behaviors in farm and companion animal contexts. Play frequency and type are used as positive welfare indicators in enrichment studies and welfare assessment protocols.
How hard an animal is willing to work for access to a preferred resource reveals the strength of its positive motivation. An animal enthusiastically pushing for access to a companion, preferred substrate, or activity reveals positive welfare states through revealed preference. These methods are used in laboratory welfare assessment but are being adapted for farm contexts.
While grimace scales measure pain, complementary tools are being developed to measure positive facial expressions. Preliminary research in horses shows distinct ear positions, eye expressions, and nostril relaxation associated with positive states (grooming, receiving positive social contact). Pig and cow facial expression work is more preliminary but progressing.
Positive welfare indicators are being integrated into farm welfare assessment protocols. The Welfare Quality® protocol (EU-funded, multi-species) includes positive welfare measures alongside negative ones. The Bristol Welfare Assessment Protocol includes positive behavioral indicators. Specific applications:
Farm-level positive welfare assessment remains more developed in research than in commercial practice, but certification schemes including RSPCA Assured and Progressive Dutch Welfare standards are beginning to incorporate positive indicators alongside negative ones.
Positive welfare assessment for companion animals has advanced considerably. Dog welfare assessment for shelter and rescue contexts includes tail wagging frequency, play behavior, voluntary approach to people, and appetitive behavior as positive indicators. The Dog Emotional Behavior Assessment (DEBA) and Bristol Dog Welfare Assessment combine negative and positive behavioral indicators into practical shelter welfare scores.
Cat positive welfare indicators include: bunting (head rubbing affiliatively), kneading, purring in appropriate contexts, voluntary approach, and play behavior. The Cat Positive Welfare (CAPWEL) framework developed at the University of Lincoln provides species-specific validated positive welfare measures for cats in shelters and homes.
The shift toward positive welfare thinking is part of a broader "good life for animals" movement — recognizing that welfare goals should include enabling animals to thrive, not merely survive without pain. The Cambridge Declaration on Consciousness (2012), evolving scientific consensus on animal sentience, and changing social norms around human obligations to animals are all driving this shift.
Practically, the good life agenda means designing animal environments that enable expression of species-specific positive behaviors — play, exploration, social bonding, foraging — rather than merely eliminating hazards. This requires more from farm and companion animal management, but the evidence increasingly shows it also produces more productive, healthier animals with lower stress-related disease burdens.
Tags: Positive Welfare Welfare Science Good Life Assessment Play 2025