I put my Bloodhound down a year ago for arthritis that nothing could help. He was 12 years old and 130 pounds so he made it a long time for a Bloodhound. They are considered old at six. He took a pain med but eventually he got where he couldn’t sit without yelping. I’m not going to let one keep going in that kind of pain.
I have two Mountain Curs that are 14 and still spry. Their joints are still good. They are each around 60 pounds so they have done well. One has never been to the Vet sick. All she has ever had has been her annual shots and exams. The other one had a tooth pulled. LOL
So sorry for your terrible loss and I offer up prayers that your two Curs live long, happy, healthy lives.
/I suspect I’m more dog than human