
On the other hand, a friend of mine has 5 bichons and has no problems with the house training.
It is a matter of persistance and routine and yes, like any small dog they do take slightly longer to house train but it can be done.
We were also told when we got our German Spitz that they were impossible to house train, but he turned out to be easier than the other dogs.
I think all dogs can be house trained, but some dogs find it easier to train their owners!