Boris certainly does - whenever the stoopid hoomans don't realise he's wanting another raisin or accuse him of being norty,which usually involves being put back into the cage :roll: he does this sour mouth thingy lol it looks hilarious!
He also pulls faces when I try to get him to taste something he doesn't fancy,it looks like he's wrinkling his nose :lol:
Bella is very good with the inquistive look. Which is why I suspect she isn't actually very intelligent :lol: