How long does it take for a food allergy to leave a dog's system?

Odell Jenkins
2025-07-30 21:02:40
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Dog food allergies can take anywhere from 2 weeks to 2 months to fully clear up, depending on factors like the severity of the allergy, how long your dog has been exposed to the allergen, and how quickly you remove it from their diet. While some symptoms like vomiting or diarrhoea may improve within days, more persistent issues like itchy skin or ear infections often take longer to resolve. Immediate Reactions Some dogs show improvement in acute symptoms like vomiting or diarrhoea within 24–48 hours of removing the allergen. Skin Issues Symptoms like itchiness, redness, or rashes can take much longer—typically between 2–4 weeks. Chronic Conditions More severe problems like ear infections, yeast overgrowth, or secondary bacterial infections may take 4–8 weeks to fully resolve, especially if they require antibiotics or other medications. Most dogs will show visible improvement by week 2 or 3. For full recovery, it’s crucial to follow through with the diet until all symptoms are gone. Stick to this diet for at least 8–12 weeks to give the body time to fully detox. Gradual Improvement Most dogs will show visible improvement by week 2 or 3.
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