My chip is a little biter what can i do?

[Tim and Squiz]

my name is Tim and i have a pet chipmunk
i dont no how old he is or if the chip is a he
i called him/her Squiz and whenever i try feeding Squiz he goes straight for my fingers.
is there anyway i can stop this???

[Sam_Spice]

Maybe fill up his bowl overnight when he's a sleep  If you post pictures of the underside of him/her someone here could sex him/her for you no doubt  shouldn't be too hard to get a picture if he/she is running up the side of the aviary