Athos goes through the two dead rats as well. Being a druid and very used to the wild, the corpses don't bother him. Then he joins in searching the rest of the room.
Perception to search the rats: 1d20+6 = 24
Perception to search the room: 1d20+6 = 22
Treasure Check: 1d100 = 100
Perception to search the rats: 1d20+6 = 24
Perception to search the room: 1d20+6 = 22
Treasure Check: 1d100 = 100