The sudden popularity of the puggle, a dog bred from a pug and a beagle, has started up a long-running argument among animal lovers about mixing breeds and species.

• 由哈巴狗和小猎犬混种而来的哈巴小猎犬的突然流行,已经在动物爱好者中间再度激起了那场关于品种杂交的长期争论。