Given the vast distances separating astronomical objects, multi-generational space travel may eventually become a practicable option in the future. Such an expedition would most likely include companion animals as well. Especially since they are deemed important in assisting humans to cope with stress and anxiety. However, just as with humans, extended periods of confinement would be detrimental to companion animals as well, resulting in psychological, physiological, and behavioural disorders. Already occurring to animals locked up in terrestrial households, it would be an even bigger welfare problem during a life-long journey in a no-way-out confined spaceship. A conceivable solution could be to genetically enhance them to fit the spaceship environment. Assuming that companion animals will be part of future multi-generational space travels, this article aims at examining how such an experience would affect their welfare, even considering the implications of genetic adaptation.
