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Hello and thank you for your question. I'm sorry that no one has reached out to you sooner about Garfield. Are you still needing help with him?If so, can you please attach pictures of what you're seeing at home? Is he licking or chewing in this area? What flea prevention is he on and when was it last applied?
Helen, thanks for your response and the pictures.We commonly see that saliva stains the coat red of they are licking. However, if he's not licking it could be due to mineral content in his food or water or yeast.Unless it is causing him problems, there may be no reason for worry. If you do become concerned, having your veterinarian take some microscopic samples for evaluation of the area may help with a diagnosis. As well, you can also try switching him to bottled water instead of tap and changing foods might also yield a change in the coloration as well.Let me know if I can help further.