Leeds United failed to win against MK Dons in the Championship on Saturday afternoon.
The New Zealand international striker missed the Championship clash against MK Dons at Elland Road due to a hamstring injury.
“We need to start doing things better,” former Leeds striker Whelan told BBC Sport during the half-time interval. “It’s been scruffy all round and I do think we're missing Chris Wood.”
It was 1-0 to MK Dons at the break, thanks to Rob Hall’s goal on the half-hour mark.
Leeds struggled to break down their visitors in the second half, but they secured a point thanks to an own goal from Antony Kay in the 87th minute.
Reflecting on the match, Whelan told BBC Sport: “The last two goals at Elland Road for Leeds have been own goals, and it is worrying.
“We struggle to score goals, we struggle to get shots on target – that is unacceptable in any shape or form, whether its semi-pro or professional level.”
Over the course of the 90 minutes at Elland Road, hosts Leeds had 61% of the possession, took three shots of which none was on target, and earned six corners.
Visitors MK Dons had just 39% of the possession, took seven shots of which two were on target, and earned five corners.
Leeds are 13th in the Championship table at the moment with 32 points from 25 matches, nine points behind sixth-placed Ipswich Town.