What Science Says About Animal Intelligence and Emotions in 2026

For most of human history, the dominant position on animal consciousness was essentially a legal and philosophical convenience: animals do not have subjective experience in any meaningful sense, therefore we are free to treat them however we find useful. This position became progressively harder to maintain as research on animal cognition accumulated through the 20th century. By 2026, the scientific consensus on certain questions has shifted so completely that the old framework is no longer defensible in peer-reviewed literature, even if it persists in policy and industry practice. What follows is not an argument for any particular ethical conclusion. It is a summary of what the research actually shows. You can draw your own conclusions from there. For the broader animal welfare perspective, see our at-home wellness for dogs guide 2026 and our natural calming supplements for anxious dogs 2026.

The Cambridge Declaration on Consciousness

In 2012, a prominent group of neuroscientists assembled at the University of Cambridge and signed the Cambridge Declaration on Consciousness, stating: “The weight of evidence indicates that humans are not unique in possessing the neurological substrates that generate consciousness. Non-human animals, including all mammals, birds, and many other creatures, including octopuses, possess these neurological substrates.” This was not a fringe document. It was signed by Stephen Hawking and a substantial portion of the world’s leading consciousness researchers. According to the Cambridge Declaration on Consciousness (2012), the evidence for neurological substrates of conscious experience in non-human animals is now sufficiently established to warrant a definitive position. The question shifted from “do animals feel?” to “which animals feel what, and how?”

Dogs — What They Actually Understand

Dogs are not small humans. They are also not simple stimulus-response machines. The research on canine cognition over the past two decades has produced findings that would have seemed implausible in 1990. Dogs understand human pointing gestures, a skill that even chimpanzees, with whom humans share 98 percent of their DNA, struggle with. According to research published in Science, dogs follow the human gaze and understand referential pointing in a way that suggests they comprehend the communicative intent behind the gesture, not just the direction of the hand. Border collies have been documented learning over 1,000 distinct object names. Dogs show a stress response when separated from their owners that is neurochemically similar to the human experience of social loss. They display grief-related behaviour changes after the death of a companion animal or human family member.

Pigs — The Underestimated Case

Pigs are cognitively comparable to dogs in most measured dimensions and exceed dogs in some. They demonstrate mirror self-recognition in some experimental protocols (a marker traditionally used to infer self-awareness), learn complex tasks more quickly than dogs, and show long-term memory of specific humans who have treated them well or badly. According to a 2017 review in the International Journal of Comparative Psychology, pigs demonstrate cognitive complexity comparable to that of dogs, chimpanzees, and some cetaceans across a range of tasks. The average pig in intensive confinement systems experiences chronic boredom in an environment with no cognitive stimulation whatsoever. The cognitive research makes this a different moral calculation than it appeared before the research existed.

Crows and Ravens — The Unexpected Ones

Corvids are the animals that most challenge the assumption that large brain size or social complexity are necessary for advanced cognition. New Caledonian crows fashion multi-step tools from materials they have never encountered before, solve problems requiring 3 to 4 step planning, and demonstrate flexible causal reasoning. According to research in Science on New Caledonian crow cognition, crows demonstrate a level of causal reasoning previously thought exclusive to humans and non-human apes. Ravens demonstrate theory of mind, the ability to model what another individual knows or perceives, in experimental protocols that have historically defined “higher cognition.” Crows remember human faces for years and communicate information about specific humans to other crows. This is a genuinely surprising finding and worth sitting with.

Best Products for Animal Enrichment and Welfare at Home in 2026

1. Zesty Paws 8-in-1 Multifunctional Supplement for Dogs — Best Cognitive Support Supplement

For dogs, cognitive health supplements targeting neurological function Support the cognitive engagement that research shows is essential to canine wellbeing. Zesty Paws 8-in-1 Multifunctional Bites 90ct, includes omega-3 (DHA for brain health), CoQ10 for cellular energy, vitamins C and E as antioxidants, probiotics. The omega-3 DHA content is particularly relevant, DHA is the primary structural fatty acid in the brain and retina, and its sufficiency is directly relevant to cognitive function in ageing dogs. A dog that is cognitively engaged and nutritionally supported for brain health ages differently from one that is not, in measurable ways that affect quality of life over years. Averaging 4.5 stars from over 100,000 reviews. Around $28–38 for 90ct. Honest flaw: contains cod liver oil, not strictly vegan. The DHA for brain health is from animal-derived sources. For strictly plant-based households, algae-derived DHA supplements for pets exist as an alternative.

2. Zesty Paws Probiotics for Dogs — Best Gut-Brain Health Support

The gut-brain axis in animals is an increasingly well-documented physiological connection, gut microbiome composition influences neurological function, stress response, and mood-related behaviour in dogs through the vagus nerve and serotonin production, 90 percent of which occurs in the gut. Zesty Paws Probiotics 90ct, 6 probiotic strains, prebiotic fibre, digestive enzymes, de-Nv pumpkin. Supporting the gut microbiome of an animal that research has confirmed experiences stress, anxiety, and social bonds is not an anthropomorphic indulgence, it is addressing a physiological system that demonstrably affects their mental state. Averaging 4.4 stars from over 50,000 reviews. Around $26–34 for 90ct. Honest flaw: probiotics for pets remain less extensively studied than human probiotic research, benefits are real but strain-specific evidence in dogs is still accumulating.

3. KONG Classic Dog Toy — Best Cognitive Enrichment Tool

For an animal whose intelligence research has shown to be considerably more sophisticated than the “ball and fetch” paradigm suggests, cognitive enrichment through puzzle feeding is one of the most impactful welfare improvements available at home. Filling a KONG with food and freezing it converts a meal into 15 to 20 minutes of problem-solving engagement — the cognitive equivalent of a dog working through a challenge in the way their ancestors spent most of their time. KONG Classic Dog Toy, natural rubber, available in multiple sizes, dishwasher safe, vet recommended. Fill with frozen peanut butter, mashed banana, or pumpkin puree for a plant-based enrichment option. A dog that spends 20 minutes daily working to extract food from a puzzle toy has a measurably lower incidence of anxiety-related behaviours than a dog that receives the same food from a bowl in 90 seconds. Averaging 4.7 stars from over 100,000 Amazon reviews. Around $12–18. Honest flaw: messy if used indoors with liquid fillings. Freeze overnight and give outdoors or on an easy-clean surface.

4. Outward Hound Nina Ottosson Dog Puzzle Toy Level 2 — Best Interactive Puzzle Feeder

Interactive puzzle feeders engage the same problem-solving cognition that the research on animal intelligence documents as fundamental to canine mental wellbeing. A dog extracting treats from a multi-chamber puzzle is doing something genuinely cognitively demanding — spatial reasoning, memory, trial-and-error learning, and persistence. Outward Hound Nina Ottosson Dog Puzzle Level 2, non-slip base, dishwasher safe, intermediate difficulty, no batteries or moving parts. Level 2 is appropriate for most dogs who have mastered a basic snuffle mat but find simple puzzle toys insufficiently engaging. A dog that finds their puzzle toy too easy stops engaging with it within minutes, which is the enrichment equivalent of handing a competent adult a colouring book and expecting sustained engagement. Averaging 4.6 stars from thousands of reviews. Around $14–22. Honest flaw: some dogs figure out Level 2 puzzles within a few sessions and require progression to Level 3. Budget for advancement rather than assuming one puzzle covers a lifetime of enrichment.

The animal consciousness research does not resolve the ethical questions it raises. Knowing that pigs remember human faces and feel boredom does not automatically dictate what human behaviour should be. But it does change the terms of the conversation. The question is no longer whether there is anything to consider, there clearly is. The question is what we choose to do with that knowledge. That is a different kind of question and considerably harder to dismiss.