Broad experimental susceptibility screen across common animals: SARS-CoV-2 replicates in the upper respiratory tract of ferrets but transmits poorly between them; cats are susceptible with deeper respiratory pathology and support airborne transmission between cage-mates; dogs have low susceptibility with poor viral replication; pigs, chickens and ducks were not susceptible under the tested conditions. relevance_note: sets the broad host-range baseline against which market/farm species (raccoon dogs, mink, civets) are compared — shows susceptibility is patchy across mammals (cats yes, dogs marginal, birds/pigs no), so market co-location alone doesn’t imply susceptibility.