JRFrenzy,
Two Jacks that won't chase a ball??? My goodness!
My JRT is ball obsessed...but then,,,he's obsessed with anything he can chase. I HAVE had foster Jacks that wouldn't play...with anything except stuffed animals. Do they play with other things? Just won't fetch?
The treat ball is a favorite at my house. Ball that you put little treats in and as it rolls around they fall out. Kind of like putting bait in the ball...they have to play with it to get it. Not just chew it, like kong, but ROLL it around. That might work.
Hope this helps!!