The article doesn't mention the orcas. I got that info from a colleague involved in attempts to acquire the ranch.
Turns out running a ranch in the Aleutian Islands is, like, logistically not recommended- as I understand it's no longer in operation.
This ranch is a great case study in "Just because you can ranch cattle here, doesn't mean you should."
There's also a caribou herd there that AFAIK doesn't wander down into the wave zone to graze, because they eat lichen in the winter. It helps to be adapted to the local area!