Current Situation
Temperature-related welfare impacts are the most immediate and measurable dimension of climate change effects on animals. Heat stress affects farm animals, particularly high-producing dairy cows, broiler chickens, and pigs, in ways that cause physiological suffering and productive loss. Climate models project that heat stress days will increase substantially across major livestock-producing regions—the US Midwest, Brazil, India, and China—by mid-century, significantly expanding heat stress impacts without adaptation. Cooling technologies, genetic selection for heat tolerance, and modified housing systems are the primary farm animal adaptation strategies. Extreme weather events—floods, wildfires, droughts, cyclones, and blizzards of increasing frequency and severity—cause direct welfare impacts through drowning, burning, starvation, thirst, and injury. Post-disaster welfare responses have been documented as severely inadequate in multiple events—the 2019-20 Australian bushfires, Pacific droughts, and Hurricane Katrina all revealed gaps in emergency planning for animals. Integrating animal welfare into disaster preparedness and response is a key adaptation requirement. Wild animal adaptation to climate change varies enormously by species. Some species (urban-adapted generalists) may benefit from warming or habitat shifts, while specialists (polar species, coral reef fish, alpine specialists) face existential threats to their welfare and survival. Phenological mismatches—when breeding seasons or migration timing goes out of sync with food availability—affect nutrition and reproductive success, with welfare consequences for young animals born into conditions of nutritional scarcity. Ocean deoxygenation, a less-discussed climate change effect, affects fish and invertebrate welfare in low-oxygen zones that are expanding globally. Fish in hypoxic zones exhibit stress behaviors, impaired swimming, and altered social behavior before mortality.
Key Welfare Issues
Advances in welfare science — from neuroscience to behavioral ecology — are transforming our understanding of what animals experience and what interventions matter most. Applying this science across diverse contexts requires collaboration between researchers, practitioners, policymakers, and communities.
Pathways Forward
Progress requires investment in research, education, policy development, and practical implementation. Understanding animal welfare science is the foundation for all effective improvement — connecting scientific evidence with real-world change in how animals are managed and valued.
Further Reading
Resources from the World Organisation for Animal Health, peer-reviewed journals including Animal Welfare, Applied Animal Behaviour Science, and Frontiers in Veterinary Science, and welfare research institutions worldwide provide evidence-based guidance.