Several other European countries have seen outbreaks of the viruses in birds, with Germany having to kill 29,000 chickens in 2020 to halt the spread of H5N8.
Experts will be on alert for any clusters of H10N3 cases, but for now, a single case is not much of a concern.
Experts have described it as sporadic.
Yet avian influenza viruses that have little impact on birds can be much more serious in people, such as the H7N9 strain that killed almost 300 people in China during the winter of 2016-2017.
Only around 160 isolates of the virus were recorded in the 40 years leading up to 2018, largely in wild ducks in Asia and some parts of North America and none had been discovered in hens thus far.
Those are short for proteins that let the virus infect cells.