She should be fine. It's not like bread dough that will rise. I've had my vet tell me to give Daisy about 5 slices of bread once, when she swallowed a whole bone.
Bread is basically nothing, it practically dissolves with water. Maybe someone else here will disagree, but personally, I wouldn't worry.
Bread is basically nothing, it practically dissolves with water. Maybe someone else here will disagree, but personally, I wouldn't worry.