Percy didn't have to have special powers to know where Plato had been. Both dog and cat seemed to have taken permanent residence in his bedroom and often in his bed, but he didn't have the heart to kick them out and leave Cass alone all day long.
He greeted Plato without paying too much attention and then went upstairs, knowing that the dog would follow him. He smiled when he saw Cass sitting up. He looked just like Plato did right before the door was opened.
"Hello, I see you had another exciting day filled with company." He walked to the bed and sat on the edge before kissing Cass. "How are you feeling?"