Based on what I've seen in cats, and dogs, who are dilutes in coloring, I question if Lavenders will ever have really profuse feathering. Isabella and Fawn Dobes, all dilutes, and Sharpeis, who are mostly dilutes, have very sparse coats, and all sorts of skin problems. Chocolate Labs, ditto. There seems to be a tendency to weakness in dilute animals.Maybe if you can infuse enough true Black blood into the Lavenders, you will see better feathering, but it will involve a lot of breeding and culling to keep that pretty color, with profuse feathering of good quality.
I'm gonna work on it
