I feed 1/2 in the morning & my husband feeds 1/2 in the afternoon - every week day. Sometimes my girls won't eat until I come home at 6 PM. They are funny creatures.
Mya probable does miss you. I think & hope your girl will eat when she gets hungry. Maybe your friend could put a small amount of doggie gravy or something to entice her to eat.
the best to you & the pup