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http://www.the-puppy-dog-place.com/dog-food-allergies.html has some great information about dog allergies. This websites tells us that dogs may be allergic to beef, dairy, and even corn when it is an ingredient in their dog food. This site also has a list of human foods that dogs can be allergic to.
An Allergen
immune responses to usually harmless substances
Yes but not to all people. Mostly the people many allergies and are well allergic to dogs.
Well food is digested. Certain people are allergic to certain thing and can have varying reactions, though.
No, but it is not really good to give dogs food you are not sure about.
None that I know of, in fact , rice-based dog food is recommended for dogs with digestive difficulties.
When someone/something is allergic to a certain food- it is usually not the actual food, but something the food contains- just like gluten, or sugar. Just like Humans can be allergic to almost anything, animals, like dogs, can be allergic to mostly anything- including limes.
Some dogs can be allergic to tuna; if you suspect your dog has a tuna allergy, you should stop feeding it to him. Also, check your dog food to make sure tuna (or fish, if the species isn't identified) isn't one of the ingredients.
It is important to read product labels when an individual has food allergies because it can cause someone to have an allergic reaction. Allergic reactions can be minor or severe enough to cause death.
Zak Bagans is allergic to the red food dye found in candies, icings, any un-natural red food contains the dye that he is allergic to
Advantages - Taste from appearance Disadvantages - Allergic reactions to food colouring, some people don't like artificial additives.