Re: piggy backing question.
I don't remember anyone talking about switching from ASF's to Norwegians. I assume that it won't be easy, since ASF's are the BP's natural prey and are usually used to get picky eaters to feed. One thing that I can think of that might help is one of the techniques used for switching from mice to rats. That would be to try get get some of the soiled ASF bedding and let your Norwegians lay in it for a while before offering them, that way, they will smell like an ASF. Please keep us posted on what you try and what type of results you get...
Re: piggy backing question.
I didn't have luck with scenting, either by rubbing or bedding. The female switched after laying eggs this year. So far she hasn't refused except when she was getting ready to shed. I hear you on the cost. I did find a guy that was breeding them. When he would have extras, I would buy them for $1. I thought about breeding my own. Good luck.