I am so very sorry to hear about this. 6 years old is way too young! Had your vet heard a heart murmur in the past? Usually, that telltale waterfall sound of SAS is something the vet can hear during an exam. Something else to consider is Hemangiosarcoma, a painless but lethal cancer that is oh so very and sadly common in goldens. They can go so fast that way too. Whatever the reason, losing your 6 year old golden like that is a nightmare, and I hope all the good times with him are the images that stay with you now. What was his name?
BISS GCHB CH Tamarack Billions Of Stars Over Poeticgold TDI CGCA CGC BPIS Top 20 2015
Goldiva Raleigh Tangled Up In Blue CD RAE TDI TT CGCA CGC
GCH CH Harborview Sweeter Than 'Shine At PoeticGold CGC
Pebwin Reverie SoothSayer CGC(major pointed from puppy class)
PoeticGold I Named A Star For You Over Knotty Pines
RainyDay PoeticGold Holding Out For A Hero