Ferrets are popular companion mustelids while otters are increasingly (and problematically) kept as exotic pets - welfare needs of both species are often misunderstood.
Ferret welfare in domestic settings is frequently compromised by inappropriate housing (small cages), incorrect diet (dry kibble only rather than raw meat or high-quality wet food), and social isolation. Adrenal disease is linked to neutering-induced hormonal disruption and can be reduced by deslorelin implants. Otter keeping as exotic pets is a serious animal welfare and conservation concern - wild-caught otters have complex social, territorial, and foraging needs incompatible with domestic life. Social media demand for 'otter cafes' and pet otters is driving wild population declines across South-East Asia.