Two cats that belonged to Michigan dairy workers died after being infected with bird flu. But it's still not clear how the animals got sick or whether they spread the virus to people in the household,

Two indoor cats in the same county in Michigan were infected with H5N1 avian flu last May, likely via their owners who worked on dairy farms. Both cats had severe respiratory and neurologic illness and died,

A new variant of the H5N1 bird flu — the same one that led to the death of a Louisiana man — has for first the first time been found in infected U.S. dairy cattle.