Gosh No...unless this little girl has been badly treated she will move over to you.

It does take anywhere from 2 weeks (we call the honeymoon period) or longer but some just a few days, again it depends on the dog. Rescue deals with this all the time and while rarely some dogs have a hard time..the truth is almost all of them transition very easily..
I never changed my dogs name but only out of respect to them...but having pulled dogs out of shelters where we didn't know their names they will change over..food will help them do that..