Hi Steve--
According to the CBP
website, the following is admissible:
-Cheese- Solid cheese (hard or semi-soft, that does not contain meat); butter, butter oil, and cultured milk products such as yogurt and sour cream are not restricted. Feta cheese, Brie, Camembert, cheese in brine, Mozzarella and Buffalo Mozzarella are permissible (USDA Animal Product Manual, Table 3-14-6). Cheese in liquid (such as cottage cheese or ricotta cheese) and cheese that pours like heavy cream are not admissible from countries affected by foot-and-mouth disease (FMD). Cheese containing meat is not admissible depending on the country of origin.
I hope you will have a chance to visit Chez Hamel in the Jean Talon market (actually, in a permanent building alongside the market). It is a wonderful cheese store.