If we look at Act I scene 5 carefully, we can see Lady Macbeth's response to hearing about the prophecy of the witches and her concerns about what might prevent Macbeth from gaining the crown that the witches have promised him. The answer to your question can be found in the soliloquy that Lady Macbeth gives:
Many cheeses today were first recorded in the late Middle Ages or afterâ cheeses like Cheddar around 1500 CE, Parmesan in 1597, Gouda in 1697, and Camembert in 1791, but there is no way to judge what recognizable relation to modern products the cheeses made in those locations bore.
Your suspicions are correct, DB. Blue and blue-green cheeses can be made from most cheese bases, whether the milk is from a cow, sheep, or goat. The main thing that makes a blue cheese blue is mold. Cheese making generally consists of three basic steps. The first step is precipitation of the milk into curds, the second is concentration of the curds and removal of the whey by pressing and draining, and the third is aging or ripening..