You're really not doing them any favors by feeding it to them.
Is bread good for dogs?
No, bread isn’t good for dogs. It contains no nutritional value for them and it’s full of carbohydrates too, so if you give too much bread to dogs it can cause them to gain weight. Additionally, your dog should get all the nutrition they need if they’re fed a complete and balanced diet of high-quality dog food. Some dogs also suffer from wheat allergies, so if this is the case with your dog, be sure to avoid bread entirely. https://www.purina-arabia.com/articles/dogs/feeding/what-dogs-eat/can-dogs-eat-bread