I accidentally got my dog addicted to bread
How did you get him addicted to bread?
I love my dog, I don't want it to starve.
Although you are being caring, it does not help your dog  to give it something that it can not properly digest. You should be feeding it dog food instead.
It's okay since I don't want my dog to starve.
That is understandable, but there are better foods to feed a dog.    You should consult with some one and find out what is safe to feed a dog in a situation where resources are limited.