Tom Mazzarisi, ranger at Madison in YNP told me that things have not gone well for the 5 remaining Haydens who had been hanging out in the Madison River since being attacked and driven from the Canyon area by the larger Mollies Pack.
He told me something I didn’t know — last winter they spent much of their time in the Madison River area. So it is only natural that the one remaining Hayden adult led the 4 remaining pups to the Madison after being attacked by the Mollies.
The Madison isn’t safe country, however. Some believed they would be attacked by the nearby Cougar Creek Pack, but instead it appears they were attacked by the much larger Gibbon Pack which recently moved up through the area and back into the Gibbon Meadows area. Now it looks like the Haydens are down to three — the adult female, a gray pup and the black pup (who has become pretty large and an effective hunter).
They were last spotted near Old Faithful and moving south toward Craig Pass .