Over here, Deb, we have very few mixes at all. I've never come across one - so my comment (in this instance !) was based on heresay not personal experience. I've always heard (in this country) that a 'mix' tends to lose many Basenji characteristics, including the barkless attribute
I do know though, that in all these years of breeding, we've never had unwanted visits from canine neighbours and my boys have never shown the slightest interest, even when next door's bitch was in season.
So I do believe that, in the main, Basenjis are not attractive to, or attracted by, other Breeds. It must be the other half that is the pushy one ! LOL