Has anyone gone through this and was the outcome the same as mine ? I have so many questions! Yesterday I took my 10 1/2 year old male cat in to my vet for his breathing, after x-rays showed the fluid in his chest you could not make out his heart. So my recommended a shot of lasix .25 mls. Blood work was fine; came home he started panting profusely, drooling and within coming home was dead in 45minutes! !! What happened ?? Can someone explain ?