I have a 4-year-old Labrador and for the past month his skin has been really irritated. I constantly see him scratching himself, especially on his ears and back. I've tried changing his shampoo but it's still the same. Could it be an allergy or something more serious?
Dandruff and constant itching in dogs can come from several things: allergies (food or environmental), fungal or bacterial infections, or just dry skin. What I'll tell you is that a month is already quite a long time for it to clear up on its own, so the best thing is to take your Labrador to the vet for a proper checkup - it could be something as simple as a diet change or a specific treatment, but he needs a real diagnosis, not randomly switching shampoos. In the meantime, avoid bathing him too frequently because that makes the irritation worse.
You need to take him to the vet because it could be an allergy, fungus, mites, or even an infection, and only the vet can properly diagnose it with an exam. Just switching shampoo won't solve anything if you don't know what's causing the irritation, so don't waste any more time and take him as soon as you can.
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