Originally Posted by Liesje
My husband does not train my Schutzhund dog(s) (or any of my sport dogs, really, whether it's SchH or agility, flyball, etc). He can of course do basic obedience or whatever commands are necessary to get them to obey around the house, go for a walk, go in and out of the house. You should both be involved in the basic obedience, house manners, crate training, potty training. Beyond that I don't "share" my dogs so I can't say whether it works or is confusing but I don't think it's very common.
This is basically the way we do it as well. I have very little interaction with my fiancÚ's competition dog and she has very little interaction with mine. As Lies said, just enough for her to listen to me when she's free in the house and vise versa.