Gao Ming wanted to hand over all the monsters in the Pet Building to Dog, but Dog was quite interesting himself. He neither clearly refused nor willingly accepted. Instead, he wanted Gao Ming to first send the monsters into the Punishment Room and then let those monsters become his followers.
After having been together for so long, Dog had guessed the uniqueness of the Punishment Room. Once the ghosts and monsters entered, their fates would become entangled with Gao Ming's, and he did this to put Gao Ming at ease.
The blind man of the past would never have had such roundabout thoughts, but the man he had become was indeed different.
The Nine-Headed Monster Bird, Deer Head Hunter, and Nianyu, covered in tentacles — when the three strongest monsters in the building submitted before Dog, complete beast patterns emerged on the black dog's body.