Villa are at the foot of the Premier League table at the moment, having managed to collect just seven points from their 17 games so far this season.
Speaking ahead of the Villans’ league clash against Newcastle at St. James’ Park on Saturday evening, former Forest midfielder Jenas said on BBC Radio 5 live: "I’ve seen it happen with my own hometown club, Nottingham Forest – they went down from the top flight and then again. It’s doable. Villa are holding on rather than pushing the boat out.
"Bolton and Charlton are near the bottom of the Championship – it’s ruthless. They were both Premier League teams in recent years.”
Forest are one of the biggest clubs of England, but they are now pretty much an also-ran in the Championship.
The Reds last featured in the Premier League in 1999 and spent three years in League One from 2005 to 2008.
The Championship is a very tough league and is arguably more competitive than the Premier League.
If Villa get relegated from the Premier League at the end of the season, then there is no guarantee that they will be able to bounce back.
Leeds United, Derby County, Middlesbrough and Sheffield Wednesday have all played in the Premier League, but now they are in the Championship.