Canine allergies are basically symptoms manifested as a result of a dog's immune system working hard to get rid of outside substances. These substances - allergens - can be anything (natural or artificial, organic or inorganic), and they can be found in a lot of places and things, such as food, in our homes, and in the environment. They can cause allergic reactions after being ingested, inhaled or absorbed.
Usually, canine allergies are manifested in three ways. The most common is itching and inflammation of the skin which can either be limited to one area (localized) or all over the body (generalized). Another manifestation involves the respiratory system and may result in coughing, sneezing, and/or wheezing. Nasal and/or eye discharge may also be present. Finally, sometimes dog allergies involve the digestive system, resulting in vomiting or diarrhea.
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