One Of The Most Common Health Problems For Pets

Just like people, animals have allergic reactions because their immune system--the system that protects the body from foreign and potentially infectious substances--overreacts to some material. Almost anything--pollen, dust, an ingredient in pet food, a household chemical, an insect bite--can set off an alarm in the immune system, causing it to pump out large amounts of white blood cells, hormones, and other material called histamines into the bloodstream

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