I don't think there would be a problem with any of the 3 cross pollinating. AFAIK, they are not members of the same plant family. I could be wrong, though, as I don't grow raspberries, just blueberries.
The raspberries are about as likely to cross with blueberries as they are to cross with the squirrel that is feeding on each. The plants are not related in any kind of meaningful way.
Eclectic gardening style, drawing from 45 years of interest and experience. Mostly plant in raised beds and containers primarily using intensive gardening techniques.
Alex
Thanks for your quick replies. I was clueless. My husband figured it would be OK but I was unsure. We will be getting to work on that berry bed very soon now.