I'm sorry to hear that your Cavalier is loosing the hair on her tail. There are several things that may be causing this. Allergies, thyroid issues, fungal infections and immune system problems are a few of the more common culprits. It would be advisable to have her into your vet so that the exact cause can be pinpointed. At home, you can try an all natural, corn free kibble. To this, 1 T of plain yogurt can be added daily (this helps with overall immune health as well as working to thwart future yeast/fungal infections). I hope she's doing better soon.
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