According to the Herald Sun, the Cats are set to table the long-term offer to the 26-year-old, in a bid to bolster their forward half depth.
While Dahlhaus wouldn’t be a direct replacement for Daniel Menzel, he could slot into his position, with Menzel the focus of a two-year deal from St Kilda.
The Cats are reportedly keen to keep Menzel, although are only set to offer him a one-year extension given his injury history.
Dahlhaus has played 154 games since making his debut in 2011, and had one of his best seasons in 2016.
During the Dogs’ premiership year, Dahlhaus averaged a career high 26 disposals, 5.4 tackles and 4.0 inside 50s per game.
The Dogs are interested in keeping Dahlhaus, although both parties are yet to agree on terms.