AUTHOR=Silva Severiano R. , Stilwell George TITLE=Editorial: Animal welfare in extensive systems JOURNAL=Frontiers in Veterinary Science VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2022.1106188 DOI=10.3389/fvets.2022.1106188 ISSN=2297-1769