Reborn as a Dog, the Strongest Guard Dog on the Planet

(Not fantasy, not changing people, not speaking human words, not reviving spiritual energy) Wangcai accidentally came to the new world and became a large dog. At first, Wangcai just wanted to guard the girl who became his master and live out his dog life lazily. However, he didn't expect that the dog world in this world is quite complicated. A dog needs to take a test if he wants to accompany humans. The first test is physical fitness. A dog certificate with the same identity card, then a guide dog certificate for the mistress, and then a spirit companion dog certificate, and then a human puppy companion dog certificate, and a human puppy guard dog certificate. These dog certificates not only require exams, but also grades. Each certificate has three levels. Do you think these few certificates are enough? That's wrong. Dogs in this new world still have many certificates, such as urban dog residence permit, off-leash street permit, owner-free street permit, large dog urban residence permit, large dog non-aggression certificate, large dog human good friend certificate, etc. Wangcai looked at these certificates and fortunately took other certificates together, such as fire search and rescue dog certificate, field search and rescue dog certificate, drug detection dog certificate, seizure dog certificate, urban wildlife prevention dog certificate, hunting dog certificate, agricultural protection dog certificate, shepherd dog certificate, cattle herding dog certificate, and the strongest guard dog certificate in the world of dog bodyguards!