I don't have any suggestions.But would like to know too.
I have a male that we have had for almost a year. We can not touch him, not even to get him out of the cage for his run time, we have to bring the
dust bath to the cage get him in it, then carry it to the room where they run, getting him back in the cage usually ends up with me getting bit or peed on. LOL
When it's snack time he is the first to beg, and doesn't bite then but grabs and runs.
The female he is with is very sweet, as was their kits.