Fact
Felix was a butcher
A butcher in Berdyansk according to Freedman, and in Buenos Aires according to Rubén. It was also the Zhmood family's trade.
Documented
The sources reach the same point by different routes. Freedman learned it from the history of the colony families; Rubén, from what Alejandro and Aida told in Argentina. Rubén did not know Freedman’s work, and Freedman did not know that this branch had reached Argentina.
What each source says
Chaim Freedman's work · documented
Koppel had a son named Yerakhmiel Falik: from Berdyansk, a soldier and a butcher.
The Komisaruk family, according to Freedman (February 2020) · documented
Yerakhmiel Falik Zmood was a butcher and lived in Berdyansk and Mariupol. It also gives David, Koppel and Moshe as butchers, and says that the husband of Tybel, Felix's sister, made his living as a butcher together with the Zhmood brothers.
Rubén's document, October 1996 · family memory
In Buenos Aires Felix worked “as a butcher or slaughterer” with the help of some fellow countrymen of the same origin and in the same trade.