I don't know if you saw this page, but it provides good info on Sumatras: https://www.tractorsupply.com/tsc/cms/life-out-here/the-coop/poultry-breeds/sumatra
According to them, it is a hardy breed, so there you go.
Sumatras are pretty friendly, but they are not great layers, so that could be a concern if you are raising your own chicks, as the offspring would probably also not be great layers. These are fairly small chickens. They also come from Sumatra and surrounding islands, which have very warm...