I would go for it mate, if it's from decent stuff and the cross that you want right enough. I got a dog at a year and a half that was chasing sheep, wouldn't jump and was really spooky but it was from good stuff and I saw potential in it so I took a chance and spent the summer working on it, come the autumn, the spookiness was gone, it was jumping great and stock broken. Add that into it that it was catching nearly everything it chased. If you put the time in and persevere with the problems they can b worked out in my opinion.