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Hi, JACustomer. Thanks for your question. Can you share a picture of the urine? Does he normally urinate on a pad?Has he had any urinary issues in the past? Any vomiting or diarrhea now? Is he straining to urinate at all?
This almost looks like mud on the outskirts of the circle. Because it appears to be associated with the urine, I would err on the side of caution and have him seen by your vet. If this indicates that there is sludge in his bladder, this will also explain his desire not to eat or drink and probably also the weekly vomiting. These can become major issues very quickly and result in the cat being unable to pee (which is then a life-threatening concern).The ER this evening would not be a bad idea, but if he's still urinating on his own without complication you should be able to wait until morning unless he worsens.More info here: http://consciouscat.net/2011/07/05/urinary-blockages-a-serious-problem-in-cats/
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