https://www.vetsurgeon.org/f/clinical-questions/8922/peracute-cases-ending-in-chf-cat-and-puppy Hi last week I saw a 8 week old lab pup bright and normal in owners eyes 2 hours before had been sick once then started with very mild tickly cough and intermittent abdominal breathing, I saw then pup at this time midnight and checked over had temp 39en-USTelligent Community 10https://www.vetsurgeon.org/thread/42354?ContentTypeID=1Sun, 31 Jul 2011 18:01:58 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:80f529ba-2bef-48ac-a11c-1ad4bf54e80fJillian Hall<p>Cats with serious advanced heart&nbsp;disease can be incrediably inconsiderate by not giving any clues at all that they are about to go into heart failure, irrespective of age.&nbsp; </p> <p>One of my colleagues lost her own cat from acute heart failure recenlty.&nbsp; The cat lived with 2 vets and they knew she wasnt quite 100% but neither had any clue she had heart disease until the morning they woke up to find her acutely dyspnoeic. </p> <p>I don&#39;t have any particular bright ideas on the puppy. </p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/42352?ContentTypeID=1Sun, 31 Jul 2011 17:07:28 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:b6fcabe7-8cb0-4718-bf7d-d1a6e8917ff4Hannah Gritti<p>I had a very similar case re: cat, it was a 4 year old indoor cat no health issues, no&nbsp;abnormalities on cardiac ausc. No known&nbsp;toxin exposure. Started with acute onset painful&nbsp;forelimb thrombus and within 1 hour progressed to dyspnoea and euthanasia, I assumed mass thromboembolic disease as chest rads normal and post mortem exodus of fluid from the lungs.&nbsp; No idea why.</p><div style="clear:both;"></div>