You may not be aware of this, but animal cruelty is quite a serious crime, and cockfighting in particular had been outlawed in the U.S. because of its extremely violent nature.
Irina was not stripped of her title and succession rights for "a [mere] cockfight." It was determined in court that she had participated in this illegal venture several times, going so far as to prepare food for attendees of these events, which were held on her property. Whether she was fully aware of the severity of her participation in these activities is debatable, but her husband, who is a former OR sheriff, would certainly have known better.
Regardless, it had been communicated by persons who actually know many of the members of the Romanian royal family that the Kreuger issue of Irina do not have close ties to their maternal family. If you read the statements that Irina's daughter gave during her mother's court case, you learn that Irina became rather isolated from all of her family after her second marriage. This is regrettable mais c'est la vie.