My dog passed away suddenly, She was fine on Thursday went for a long walk by Friday she was short of breath during the night it got worse and Saturday afternoon I took her to the Vet hospital where she crashed and they said that her lungs were full of fluid as well as her stomach. She is a 13 year old cockapoo. She has had a cough for quite some time but it got worse but also had bad allergies. She had breat cancer twice and has been ok for 5 years