We PAP test our entire herd at 6,000’ when they are 12 months old. This gives us the most accurate test available. The following articles will provide more details on things to consider when it comes to PAP testing:
https://www.angus.org/tools-resources/national-cattle-evaluation/pulmonary-arterial-pressure
https://guidelines.beefimprovement.org/index.php/Pulmonary_arterial_pressure_(PAP)
https://beefrepro.org/wp-content/uploads/2024/06/2023-ARSBC-PAP-Questions-and-Answers_-Holt.pdf