Yeno is out of the same lines as our Delwyn (Daisy) her mother is, I believe he has the same father and his mother is a littermate of Yala's mom you could contact this breeder http://www.van-de-utadreef.be/ he has Delwyns mom at this moment and probably could tell you more about her character and the lines (I already told you about Delwyn's) and mostlikely also about Yeno.....
I think the second kennel has Yeno's littermate who was a very tough nasty police dog. Yelo was retired due to biting his handlers. I talked to the guy that owned him before this dog going to southwest.... extreme drive and tough dog!!!