Everyone smoked in my family but me (the baby), and I'm the last one left. Both parents died of lung cancer. My only brother, a Vietnam vet died of a massive heart attack at 51. He had also stopped smoking after a mild heart attack at 48. My oldest sister lived til 74, the longest up until that time. That was only because she'd been institutionalized most of her adult life because she was an alcoholic who suffered from alcohol-induced dementia. NY State cut out all smoking for residents. She died of a stroke.
About your Jack Russell pup. I love those dogs. I was first introduced to the breed watching the Wishbone Mysteries, I think were on PBS in the afternoon. I also knew that in medieval times, they used them as rat catchers. When my brother passed, I got reacquainted with cousins on my father's side of the family. My cousin Sonny and his wife had a Jack Russell. Her name was Lucy. She was a character. Both Lucy and my cousin have been gone for a while now.
Time marches on whether you like it or not. I tell young kids to make sure they know that the older they get, the faster time will fly, so enjoy it while you can.
Your family has certain borne a long series of medical problems. Being the "baby" of the family, you will be seeing most of the family pass. All of my parents generation have passed. I have a sister and cousin who are still alive from my generation. Another cousin passed from esophageal cancer. We were just months apart in age.
My Dachshund and Jack Russell pups woke me up at 7:20 this morning. My wife was already up, so I was "fair game" for a morning snuggle. It's not a bad way to wake up.