After eating, Rex left the dog with Nathan and spent some time instructing him how to take care of Kater, and, especially, not to let it eat feces!

When he saw Hilda go into the bathroom to wash her hands, he hurriedly walked up to Nathan and whispered, "Commander, I think something is wrong with Hilda recently."

Nathan seemed to know what he was talking about and responded in a low voice. "Hmm?"

Rex was embarrassed. "I can't tell what's wrong, but she has talked less recently, and something feels wrong with her. I tried to get her to rest but she wouldn't... Oh, just pay attention to her! Maybe...