05-23-2010, 12:01 AM
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Lots of plants can cause photosensitization, but this doesn't look like it (which is the concern with St. John's Wort). It would be on the white areas only and this definitely looks like self mutilation because he is very itchy. I would think about allergies or fungal infection, which both have been mentioned. I would call in the vet before he does some real damage from over scratching!