I had a border collie/healer mix die on Christmas Day, and had to have a Bassett Hound put down 5 years later, both had lymphatic cancer. Both are buried side by side on the hill behind my house.
That's where I'll probably bury my 12 year old Dachshund when he dies, but not anytime soon (I hope!). He's going thru his "second puppyhood" right now, and is giving our younger dogs a real challenge sometimes to keep up with him.
They truly do leave "pawprints on our hearts".