Q. My 11 bl Shih Tzu has broken out with red itchy rash all over. Benadryl seems to help. After the med wears off it slowly comes back. I

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A. It sounds like he suffers from allergies. If you want, you can have blood tests done on him to understand what he is allergic to and then receive appropriate treatment.( diet, vaccine, other medications ) , or have palliative treatment which, as you noticed, it' s not going to lead to a complete resolution.

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