Complex sentence: In the 1880s soundness was sacrificed for type (widely attributed to the short-headed but straight-stifled Ch. Crown Prince), and subsequently, the Mastiff lost popularity but gained a consistency of type, with leaner, longer-headed specimens becoming less common.
Split into simpler sentences: In the 1880s soundness was sacrificed for type (widely attributed to the short-headed but straight-stifled Ch. Crown Prince). Subsequently, the Mastiff lost popularity but gained a consistency of type, with leaner, longer-headed specimens becoming relatively less common.