Despite a promising performance the Swans were unable to inflict a first home defeat of the season on Doncaster.
A depleted side made the trip to the Keepmoat Stadium and enjoyed large spells of possession in either half.
Tom Butler hit the bar midway through the first-half while Craig Beattie had a penalty shout turned down.
The visitors created less chances in the second period but did have chances to sneak a win at the end.
Marcos Painter past a late fitness test to make the starting line-up at the Keepmoat Stadium.
The left-back had been missing since the defeat at Preston earlier this month with a calf injury and replaced the injured Fede Bessone.
There was also some good news surrounding the fitness of Darren Pratley - the midfielder had been out since the opening pre-season game against FC Twente with a shoulder injury while illness also extended his rehabilitation.
Stephen Dobbie was also on bench following a month on the sidelines with a rib injury.
Donny:Neil Sullivan, James Chambers, Adam Lockwood (C), Sam Hird, Gareth Roberts, Dean Shiels, Mark Wilson, John Spicer, Martin Woods (James O'Connor, 90+4'), James Hayter (Waide Fairhurst, 80'), Billy Sharp (Paul Heffernan, 86').
Not Used: Byron Webster, Lewis Guy, Ben Smith, Mustapha Dumbaya.
Swans: Dorus de Vries; Angel Rangel, Alan Tate, Garry Monk(C), Marcos Painter, Mark Gower (Besian Idrizaj, 87'), Ashley Williams, Jazz Richards, Tom Butler, Craig Beattie (Darren Pratley, 62'), Gorka Pintado (Stephen Dobbie, 75').
Not Used: David Cornell, Lee Trundle, Kerry Morgan, Chad Bond
Referee: A Haines (Tyne & Weir)
The visitors started strong with a new system consisting of two strikers, Gorka Pintado and Craig Beattie - who's making his first start since late August - but it was returning midfielder Tom Butler that had the game's first chance on three minutes.
Ashley Williams' crossfield pass picked out the Irishman, making his first start of the campaign, and he cut inside only to see his shot blocked by Sam Hird.
On a mild night in South Yorkshire Paulo's side came close again three minutes later - Rangel winning a corner on the right and from Gower's flag-kick Craig Beattie found space at the near post but sent his header over.
Donny fought back and a fantastic move ended with Rangel bringing down Martin Woods, and receiving a yellow card for his troubles; Woods picked himself up, curled his effort goalwards from 30-yards and forced Dorus de Vries into making a fine save.
Dean Shiels fired wide moments later while Gorka Pintado was inches away from opening the scoring on 11 minutes, his outstretched boot failing to connect with Gower's low ball across the box.
El Toro found himself in a similar situation midway through the half as he was inches away from Butler's right-sided cross, which was cleared for a corner, and from Gower's cross Butler connected and deflected his effort onto the crossbar.
A dominant spell by the visitors continued as we entered the 24th minute with Pintado racing on to Williams' long ball forward - he took it to the byline, laid it back into the area where Beattie was placed to strike fiercely at goal only to be denied by Neil Sullivan.
The Swans continued to pressurize the home defence and the Donny fans were starting to get agitated,
But a counter attack following a Swans corner led to Dean Shiels seeing his angled shot deflect off Angel Rangel for a corner 10 minutes before the break while two further Donny attacks in quick succession had to be dealt with inside de Vries' area.
Jazz Richards was looking strong and comfortable in midfield and on 39 minutes opened up play for Gower to cross for Pintado who dragged his shot wide.
And as the half drew to a close Craig Beattie had a penalty shout turned down as he raced on to the end of Pintado's flick and grounded by James Chambers, only for referee Andy Haines to wave play on.
Half-Time: Donny 0 Swans 0
The home side kicked-off the second-half in explosive style and came inches away from breaking the deadlock, after just nine seconds!
Attacking their own fans, Donny midfielder John Spicer carried the ball all the way to the edge of the Swans area before beating Dorus with his low effort but fired just wide of his right-hand post.
Craig Beattie failed to pick out Gower on the overlap as the Swans broke while another move involving Gorka Pintado was thwarted by the Donny defence.
Former Swans loanee Mark Wilson fired well over the top just after the hour before Paulo made his first change of the night with Beattie making way for the returning Darren Pratley.
Tom Butler won his side a free-kick in dangerous territory on 65 minutes when he was brought down on the edge of the area by Hird - Gower struck it right footed, through the wall and saw it trickle wide of Sullivan's goal.
Martin Woods robbed Gower of possession midway inside the Swans' half before storming forward to shoot just wide while the former Southend man saw another free-kick, this time from the right, punched away by Sullivan.
Jazz Richards was harshly penalised when John Spicer flicked the ball onto his arm, the referee awarded a free-kick 20-yards from goal which Woods forced de Vries into saving and Hayter fired the follow-up into the side netting.
With 15 minutes to go Paulo made his second change, this time a straight swap in attack as Stephen Dobbie entered the fray for the first time in five weeks in place of Pintado.
And within two minutes of entering the field the Scottish front-man fired over the top of Sullivan's goal from distance.
Dobbie turned provider five minutes from the end - after keeping the ball in play on the left he used his pace to take it past Chambers before crossing low into the area; Butler was placed at the far post but the ball raced past the winger's outstretched boot.
Paulo's final throw of the dice came on 87 minutes as Besian Idrizaj returned to first-team action in place of Mark Gower.
But it was a Dobbie effort deep into injury-time, which flew over the top of goal, that was the final piece of action in South Yorkshire.