1) The little girl refuses to eat the food we ordered. Her mom has to place a side order of sandwich for her specifically.
2) The little girl refuses to eat the food we ordered. Her mom has to order a side order of sandwich for her specifically.
The little girl refuses to eat the food we ordered. Her mom has to place a side order of a sandwich for her specifically. [Correct]
The little girl refuses to eat the food we ordered. Her mom has to place a side order of a sandwich specifically for her. [better]
Or: '. . . . Her mom has to order a sandwich just for her'.
Rover