Sure. [he continued smiling, glad to help if he could!] But don't do any of that. They won't understand that you're angry until they get to know you more. And bribing them with food will only make them spoiled...

You have to treat them like a normal person, too. You have to slowly get to know them until you understand their behavior... Just like how it takes time to get to know someone. You can talk to them often and give them affectionate pats. Eventually, I'm sure they'll let you touch them further.