As I researched this I found some alarming information on union attempts to organize Dannon ( Danone ) dating back to 1983 in the New York city metropolitan area. The Teamsters ( local 584 ) represented the workers at the time. Dannon has plants all across the US and each one has slowly organized. As anyone can see, labor issues have been an ongoing issue with Dannon for more then 40 years.
This link is the story from 1983. It is a New York Times article, but digitized and available to view.

UNION FIGHT WITH MAKER OF DANNON YOGURT IS BITTER AND VIOLENT March 11, 1983
https://www.nytimes.com/1983/03/11/n...d-violent.html

This new article is from the BCTGM local 19 in DuBois Pennsylvania.

Union organizing wins at Danone USA
On February 27 and 28, workers at the Danone yogurt and plant-based powder plant in Dubois, Pennsylvania voted overwhelmingly to become members of the IUF-affiliated BCTGM Local 19.
The representation win follows a massive vote for representation by the IUF-affiliated UFCW at the Danone plant in Dallas, Texas last June following a determined organizing campaign. The election win was followed by the negotiation of a first collective agreement for the Dallas Danone workers signed in October.
A 2019 agreement on union access and management neutrality between the IUF, our North American affiliates and Danone management in Paris and North America facilitated the successful organizing.
Union organizing wins at Danone USA | IUF UITA IUL