Which breed did Jack Read use to correct the coat texture introduced by an earlier infusion?

Answer

Staffordshire Bull Terrier

Jack Read used a Bedlington Terrier to introduce 'more drive,' followed by a 'brown' Staffordshire Bull Terrier to correct the Bedlington's coat texture.

Which breed did Jack Read use to correct the coat texture introduced by an earlier infusion?
HistoryDogbreedTerrierNorwich