Facebook fan account
AeroFANatic cites an on-scene source that Cooper said, "If you notice one of our brothers is not onstage with us, he was very sick before the show."
On Saturday, video of a gaunt Parry promoting the Sunday night show
was posted on the venue's Facebook page.
Hollywood Vampires are in the midst of an 18-date summer tour.
Cooper posted a tweet at 11:30 p.m. that confirmed Perry was in stable condition and receiving "the best care."