Climate change is driving range shifts in thousands of wildlife species, as animals track suitable thermal conditions poleward or to higher elevations. These range shifts create novel welfare challenges: species moving into new territories encounter unfamiliar predators, competitors, parasites, and prey. Barrier crossing - roads, urban areas, agricultural land between refugia - causes injury and mortality. Species failing to shift fast enough face habitat degradation, starvation, and heat stress in situ. Novel host-parasite interactions as ranges overlap create disease exposure to immunologically naive populations. Welfare-positive climate adaptation strategies include wildlife corridors facilitating range shift, assisted colonisation programmes for slow-moving species, and habitat management to maintain thermal refugia. Research on climate-welfare intersections is nascent; the field lacks systematic frameworks for assessing individual animal welfare costs of climate-driven displacement. Conservation organisations are beginning to integrate welfare science into climate adaptation planning.