'The animals’ airway architecture is uncannily similar to ours, and unlike most lab mice, ferrets are vulnerable to catching and passing on flu viruses—even developing the same coughy, sniffly symptoms that so many humans do. But most flu-transmission experiments in ferrets remain limited to artificial circumstances: pairs of animals in tiny cages with dividers between them, where scientists ogle them inhaling each other’s air for days or even weeks.'

https://www.theatlantic.com/health/archive/2023/08/day-care-ferret-flu-transmission-research/674972/