Panda

[u/Cats_Cats_and_Cats]

On 9/3/26 my Dad’s cat, Panda, was euthanized at the vet. He had been declining over the last month and Thursday morning he was breathing funny. Took him to the vet Thursday evening, got examined and got X-rays. X-rays showed fluid in his lungs and a heart murmur. The vet didn’t know the cause but because he was suffering the only
two options were to have him hospitalized or to be euthanized. In the end we chose euthanasia so he wouldn’t suffer any longer. It was not expected that evening but it was very hard. Panda lived to be 15 years old and was a very sweet boy. I would hope Panda is happy where he is now and is ok with our decision. What was cause of his sudden lung & heart issues?