Moray Low, Alastair Kellock and Graeme Morrison trained with the squad indoors at Riccarton today.
Also taking part were Phil Godman, Ben Cairns, Calum MacRae and Craig Hamilton (all Edinburgh), Alasdair Strokosch (Gloucester) and Simon Danielli (Ulster).
Glasgow's Andy Henderson has been cleared to play against Wales despite headbutting a French opponent on Sunday.
Six Nations citing commissioner Achille Reali decided no action should be taken following the incident involving Damien Traille.