How To Care For An Orphaned Baby Crow?

i am only 11 but i have cared for many birds before including hurt pigeons, doves, and robins. i have never cared for a baby bird though, espicially a crow. i have been keeping it in a box with a few towels by a lamp and i have been feeding it warmed up canned dog food. the baby has feathers and it walkes like its lying down. some of its claws are deformed. i dont know what to do. i just want to raise it until i can let it fly away. please help.