Not rare to see here in Germany. I have seen it for Austrian-grown chicken to be slaughtered in Germany, similarly Argentinian beef is sometimes cut in the Netherlands.
EU regulation stipulates:
> The term ‘origin’ should be reserved for meat obtained from animals born, reared and slaughtered, and therefore wholly obtained, in one single Member State or third country.
https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=15906711...)
UK law requires country of birth, country of rearing, country of slaughter and country of cutting to be on the product.
Slightly surprising that US consumers don't get so much information.