Midfielder Dawson and defender Kennedy start respective three-game bans following straight red cards in Saturday's 6-0 home defeat to Charlton, while another defender, Foster, is ruled out after sustaining a calf injury.
Kelvin Etuhu, operating in midfield under manager David Flitcroft, remains doubtful due to the hamstring injury that kept him out against Cardiff and Charlton.
Flitcroft will also be without defenders Jimmy McNulty (ankle) and Rory Delap (calf), striker Reuben Noble-Lazarus (ankle) and left-back Scott Golbourne (knee), but centre-half Martin Cranie, who has missed the last three games due to a hamstring injury, is expected to return to contention.
The Tykes, a point from safety with four games remaining, are bidding to climb back out of the bottom three.
- Sports & Recreation
- David Flitcroft