Canadian Railroads > Tipping Sleeper Attendants?

What is the usual practice or custom for tipping sleeper car attendants on the Canadian? Also, do they re-crew enroute so one would have two attendants from VAC/TOR?

Yes, they change at Winnipeg so you will have two different attendants to tip.  I usually give the tip to the attendant a couple of hours before arrival because things can get a bit hectic during the unloading process.  I don''t know what others tip, but I typically use $20 as a base, and more if the attendant has been particularly helpful.

I also go with the above response UNLESS the service I receive is poor which only happened to me once on the Canadian.  Then I only went with $10.  My wife thought it should have been zero!

Also in the dining car I usually give the gratuity directly to someone (someone on a Sunset Ltd trip was stealing tips left on the tables) during the last meal before my destination.  In addition,  I usually provide a gratuity to Park Car staff for good service--staff that carry my glass of wine up to the dome for me rate well with me.

And yes, all on board service staff do change at Winnipeg.

Most if not all Via onboard staff are excellent !
As I recall from a couple of trips I tipped $40.