Adam Rooney scored a hat-trick as Aberdeen took advantage of Celtic’s slip to move level on points at the top with a 3-0 win at home to St Johnstone.
Two Rooney headers in the opening 18 minutes put the hosts in control and he completed his treble from the spot in the 81st minute as the Dons maintained their unbeaten start to the campaign.
In contrast, bottom side Kilmarnock’s wretched start continued with a 2-0 loss at home to Ross County.
Craig Curran opened the scoring with a 34th-minute header and Kenny van der Weg doubled the lead a minute before the break as Owen Coyle celebrated a winning start to his reign as County boss.
Partick Thistle also remain without a league win this term after they went down 3-0 at Motherwell.
Peter Hartley opened the scoring after only seven minutes, with Craig Tanner adding the second 11 minutes into the second half. Elliott Frear got a late third.
Elsewhere, Kerr Waddell’s 93rd-minute winner – his second of the game – earned Dundee a 2-1 home win over Hearts.
Kyle Lafferty, who earlier this week admitted he was battling a gambling addiction, put his off-field problems to one side to cancel out Waddell’s 44th-minute header in the 71st minute, but it was not enough to earn a point.