I have had a number of foals born with both dorsal stripes, leg barring and even one that had facial webbing as a foal. I believe some of the foal coat counter shading Im seeing has a lot to do with the Sooty Gene.
The sire of the above mentioned ponies was born a classic Dark Seal Brown from a buckskin mother and chestnut father. There is absolutely NO dun or cream involved in any of the above. We have had many born with a dorsal stripe and leg barring over the years.