
The Villa chief is leaving no stone unturned as he to tries to strengthen next month and West Brom skipper Curtis Davies and Manchester United defender Phil Bardsley are among his potential targets.
O'Neill said: "We haven't got a strong enough squad and outside of Olof Mellberg and a couple of others, we have a very young side. "They are showing a great willingness and ability but we do need strengthening for every single reason under the sun."
Aston Villa manager Martin O'Neill has admitted to being "worried" ahead of the daunting looking festive programme as his side look to stop their gradual slide down the Barclays Premiership table.
O'Neill conceded he felt at his lowest ebb since taking charge of Villa four months ago after the home defeat by Bolton on Saturday left the midlands club in ninth spot.
They have failed to win in six games and now have to face leaders Manchester United, in-form Tottenham and second-placed Chelsea in the next fortnight in addition to bottom-of-the-table Charlton.
O'Neill has always been aware that his side would hit a rocky patch and he is desperate to bring in new blood during the January transfer window.
He said: "I've been worried since the start of the season. This is the situation we find ourselves in. We were only able to add Stiliyan Petrov to the squad in terms of buying anyone.