Well finally I know what Dilbert is mixed with. On the weekend while Tim and I were at he off leash park I saw this beautiful white dog in the distance, I looked at Tim and said hey therse a Pyr! ( don't see them very often around here) The women keept walking with her dogs down the path. Well about an hour later we saw her again and my mouth dropped her Pyr mix looked exactly like Dilbert, only Dilbert is taller. Tim asked her what kind of dog it was, and she said "well Daisy is a rescue, so I am not certain what she is, but she is mixed with boarder collie, she has a very strong herding instinct" We then told her that her Dilbert is a pyr mix, and it looks like Daisy has Pyr in her. I wish I had a camera that day, they looked like twins!! And like tanimara said it is not uncommon to find mixed working dogs, they are unaltered they will mate. So I finally know what he is mixed with.
And from looking at border collie pics, he has the ears.
Nina