I have posted before and I have three basenjis and a decker rat terrier from the original lines. It is said that basenjis were used to make deckers way back when. The older deckers do have the wrinkling. They also do not bark, and when they lay down they splay their feet in the back. The only thing I can say and this is because I rescued my decker and there were many rescued from the same breeder and I have kept in touch with a couple. They are not active except when their prey drive kicks in. They are known to be aggressive because they bond very strongly to their family. My decker was aggressive, it was ALOT of training to knock that out. I definately see alot of basenji in your pup. The body, tail and stance definately reminds me of a decker but the color throws me off. I have seen standard rat terriers in that color but not deckers. Either way, the pup is beautiful and you are very lucky if it is basenji or decker or any breed for that matter Basenji and decker are both wonderful breeds.