My 2yo cat is in the emergency. They still don't know what is wrong with him. He became very lethargic, which is highly unusual for him at his age. We scheduled an appointment with his vet, on Fri, but he continued to be unchanged so I took him to emergency yesterday morning and he is still there and still sick. They found something on his bladder and he is not urinating, so they are focusing on that right now. He was perfectly normal in the morning, by the afternoon he was hiding and sleeping all day, which is out of character because he is super social. So when he was still like that yesterday, I took him in.