After 50 and its silver.
I started in my mid 40's. So did Mr. Happy. We're grayer than gray now!
I have one now. He's 13 and slowly going downhill. I've had him since I was 22. It will be difficult to have another dog after having him. He's been a special companion.
In my whole life, I don't think I've ever gone more than 2 months without a dog in my family.