Gus actually talks.. He mimics words and sounds.
He says: "He-llo", "Bis-cuit" "Noooo", "I don't know", "Mu-mmy", "Out", "Me".. And loads more that I have probably forgotten!
He also makes the chewbaccary noises, and looks at you intently while he is doing it, as if you know what he is talking about! LOL!