CREATE TABLE table_4164 ("Province" TEXT, "Number of Dairy Farms" FLOAT, "Number of Dairy Cows" FLOAT, "Production  ( hectolitres ) " FLOAT, "Dairy Cows per Farm" FLOAT, "Production  ( hectolitres )  per Farm" FLOAT)

what is the least amount of milk cattle in ontario
SELECT MIN("Number of Dairy Cows") FROM table_4164 WHERE "Province" = 'Ontario'
SELECT MIN("Number of Dairy Cows") FROM "table_4164" WHERE "Province" = 'Ontario'