The Doctors say my 7 month old kitten has heart and kidney disease. I don't understand? Up until 10 days ago, he was running around my house like a crazy cat with his tail straight up. He showed absolutely no signs of major diseases. That all changed when I took him in for nurturing and vaccinations. I brought him home the next day and he never recovered. After a few day, he started having breathing problems so took him to the hospital where he spent three nights. They treated the fluid in his lungs, and I was told he has mild hypertrophic cardiomyopathy and he would need medicine to slow the progression. We brought him home and his condition worsened over the last few days. He drank water, but would not eat, and he was extremely tired. We took him back to the hospital today and was told he also has kidney disease. I don't get it. How can, what appeared to be a happy, healthy kitten, medically change so drastically after a nurturing procedure and vaccinations? Has anyone else dealt with anything like this?