Yes, dogs can eat toasted bread in tiny amounts.
However, some ingredients found in toasted bread can be harmful or even deadly to dogs. White flour is one of the most common ingredients in toast and can cause serious health problems for dogs.
Toast containing white flour should not be given to any animal if it contains butter, jelly, cinnamon, sugar, or anything else that could potentially harm a dog.
The calorie and carbohydrate content of bread is not an issue for most dogs, but the risk of a life-threatening allergic reaction or other complications should never be taken lightly.
There are some breads that can be safe to feed to dogs; however, it depends on the ingredients listed in the recipe.
Bread containing brown sugar and raisins is unsafe for dogs.