Our goats are given day old breads. They also get other scraps. Actually most of our animals get some sort of scrap. Pigs, goats, rabbits, sheep, chickens, ducks, geese, turkeys, guinea. Even the llamas, and horses love a few people scraps now and then.
Bread is obviously a great treat for them(we get ours from the bakerys--truck load of bread for something like $10.00)
Fruits and veggies scraps are enjoyed by all.
Even cerals, dried beans, powdered milks, etc. etc.
Our pigs are extra spoiled with other people food scraps. They love having maple syrup poored over there food.
I wouldn't think bread should be to much of a problem. I dont think it would let her eat at free will 'ALL' the bread she wanted, but a few slices every day shouldn't hurt.
Again, just my suggestions.....it's what I would do too....
Shawna