In recent years the island has lost nearly all of its dairy herd and its cheese making. Sure there remains sheep and beef. Farmers are turning to growing barley for the ethos of Islay whisky completely from Islay.
Yes, Islay whisky has a global market for single malt and for blending and the current distilleries can sell all they make.
Two things worry me, all eggs in one basket – if something happens to global whisky consumption, Islay is in serious trouble, the other point is that the island infrastructure, specifically road, ferry, waste disposal and water supply are under considerable strain at present. With existing distilleries looking to massively increase production and 4 new distilleries in the pipeline, in addition to rum and gin production, can the island cope??