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 GCHS AM CH Tamarack Billions Of Stars Over Poeticgold CD RN TDI CGCA CGCU CGC BPIS Top 20 2015 "Mystic"
Goldiva Raleigh Tangled Up In Blue CD RAE TDI TT CGCA CGCU " Tally"
GCH AM CH Harborview Sweeter Than 'Shine At PoeticGold CGC " Lush"
AM CH Pebwin Reverie SoothSayer CGC BPISS "Sayer"
PoeticGold I Named A Star For You CGC BISS "Cambridge"
RainyDay PoeticGold Secret Society Major Pointed CGC "HipHop"
PoeticGold Book Of Laughter & Forgetting "Marshall"