Ulster lock Ryan Caldwell is the player to lose out as Alan Quinlan and David Wallace stay in the matchday panel to bulk up the back row cover.
Wallace is fit to feature on the bench after recovering from a tooth abscess.
Explaining the decision to omit a specialist second row from the bench, Kidney said: "We just think, going into this game, there's going to be a lot of activity in and around the breakdown, so we've gone with a few extra loose forwards.
"We have enough cover in the second row, we feel we can slot them in if needs be.
"(If there is an injury in the second row) it will be a bit of mixing and matching between scrums and lineouts. We've been practising it during the week and feel we have enough cover there.
"It's a tough one on Ryan because he's been going well at training. We had to weigh up a number of minute factors and we just felt that this was the best combination (for the bench)."
IRELAND TEAM & REPLACEMENTS (v Canada, GUINNESS Series 2008, Thomond Park Stadium, Saturday, November 8, kick-off 5.15pm):
15 â00 Keith Earls (Young Munster/Munster)
14 â00 Tommy Bowe (Ospreys)
13 â00 Brian O'Driscoll (UCD/Leinster) (capt)
12 â00 Luke Fitzgerald (Blackrock College/Leinster)
11 â00 Rob Kearney (UCD/Leinster)
10 â00 Ronan O'Gara (Cork Constitution/Munster)
9 â00 Eoin Reddan (London Wasps)
1 â00 Marcus Horan (Shannon/Munster)
2 â00 Jerry Flannery (Shannon/Munster)
3 â00 Tony Buckley (Shannon/Munster)
4 â00 Donncha O'Callaghan (Cork Constitution/Munster)
5 â00 Paul O'Connell (Young Munster/Munster)
6 â00 Stephen Ferris (Dungannon/Ulster)
7 â00 Shane Jennings (St. Mary's College/Leinster)
8 â00 Jamie Heaslip (Naas/Leinster)
16 â00 Rory Best (Banbridge/Ulster)
17 â00 John Hayes (Bruff/Munster)
18 â00 Alan Quinlan (Shannon/Munster)
19 â00 David Wallace (Garryowen/Munster)
20 â00 Peter Stringer (Shannon/Munster)
21 â00 Paddy Wallace (Ballymena/Ulster)
22 â00 Shane Horgan (Boyne/Leinster)