Allergies can have very different causes in dogs. There are, however, three triggers, which very often lead to allergic reactions and lead in many dogs to symptoms such as itching or gastrointestinal problems.
Constant scratching, biting and chafing may indicate fleas in dogs. But sometimes the trigger is also an allergy. Certain dog breeds tend to always develop the same allergies: the Irish Red Setter, for example, is particularly often struggling with grain intolerance. Basically, it is in dogs but especially three allergies that occur particularly frequently.
Mites: Most common trigger for allergies
Especially house dust and fodder mites cause some severe allergic reactions in dogs. They lead to persistent itching, redness and subsequently also open skin on the entire body. In the jargon, the veterinarian calls this type of allergic reaction an atopy or atopic dermatitis. Apart from mites, however, molds or pollen can also trigger such an atopy. This type of allergy usually develops in dogs only after the first year of life.
Food intolerance in dogs
The food allergy or feed intolerance is very common in dogs. It causes as well as an allergic reaction to mites a strong itching, in addition to vomiting and diarrhea. Most quadrupeds develop food intolerance as early as the first few months of life. The most common trigger is beef, followed by cow's milk, wheat and chicken.
Flea allergy: If the itching does not stop
The third most common allergy in dogs is the flea bite allergy. In this case, the trigger is not the flea itself, but the saliva transmitted with the bite. In contrast to the other allergies mentioned above, the rash in this case focuses mainly on the back area and on the croup - the transition area between the lumbar spine and caudal vertebrae.