Evie (my 12 week baby) hides her food

lol
Is this a normal behavior??
I mean.. she doesn't hide the normal food.. she hides the raw hides and treats.. I am so confused.. Yesterday... I found an Iams bone IN MY PURSE
Kayah's never ever had this type of behavior.. and it's soo weird/different to me.. I mean, I know dogs bury bones.... but we're not outside for cryin out loud!