Fourth positive bird flu case confirmed amid surge of calls to animal disease hotline SBS Australia Chickens culled, global outbreaks: Bird flu's deadly rise, in numbers Australian Broadcasting Corporation Fourth case of deadly flu detected in migratory seabird The Canberra Times How is the Australian poultry industry preparing for a possible outbreak of bird flu? The Conversation Bird flu can be fatal for cats and might stop off-leash dogs SMH.com.au