Zoetis is trading 6.8% down at $69.27 after hours, with the cause unclear. - No confirmed company-specific announcement explains the move; the October 13 board appointment announcement does not establish a connection. - The Q2 guidance reduction was reported earlier; the latest search results point to the November 5 Q3 report, not a new after-hours release. - Supplied market data shows no broad index move greater than 0.5% in the same direction.