This link about the progress of the annual strains of bird flu in both animals and humans makes interesting reading. Unfortunately it only goes as far as 2012, so doesn't contain any evidence about the current strain. However, it does make it clear that the earlier outbreaks in Indonesia and the Midddle East were largely centred on family groups, probably people keeping the equivalent of our backyard chickens for eggs and meat. Mortality rats were around 60%. The risk of infection from close contact with poultry is very low with the current strain, but the danger lies in the possibility of it mutating, as it could easily do if, for example, a person with seasonal flu was exposed to the HN virus at the same time. Unlike seasonal flu, HN is not transmitted via infected droplets from coughing and sneezing, apparently it gets deep into bronchial passages through inhaling infected dust from dried bird droppings, so keepers of poultry are in the front line, especially if they have lowered immunity levels for reasons of age or other medical conditions, eg asthma ec. Research has shown that it was most probably a mutated HN strain which caused the worldwide flu pandemic in 1918, which killed more people than the 1st world war, including the young and healthy, so it could happen again. The link also shows that mammals fed with infected bird carcasses have died, eg cats eating wild bird corpses, and tigers in zoos ec. Scary stuff.
See http://www.who.int/influenza/human_animal_interface/H5N1_avian_influenza_update.pdf