Beginning in the 1970s Dunn's Famous began to focus more on Montreal-style smoked meat, eventually stopping its promotion of Pastrami.

[4] Ina Devine, daughter of Aideh Dunn, had franchised the restaurant outside Quebec, with several locations in Ontario and one in British Columbia, however, today, only one remains (Dalhousie Street in the Byward Market area of Ottawa).

[7] When the controversial Charter of the French Language (Bill 101) became law in 1977, the Office québécois de la langue française (OQLF) took action against Dunn's and other stores retailing imported kosher goods that did not meet its labelling requirements, an action perceived in the Jewish community as an unfair targeting and antisemitism.

Dunn's, along with other well-known delicatessen establishments, also fought a ruling to change the name of "Smoked Meat" to "Boeuf Mariné" in order to conform to Quebec Language Law.

[12] Due to the work of Myer Dunn, under the new ruling, enacted in 1987, Smoked meat became a word in both Official languages of Canada.