Sabrina, Many Happy Returns of the day!! Hope your special Birthday brings you lots of great titbits and cuddles!! My own lovely girl is heading towards 20 now, although like yours and Lachlandmarcus behaves like a yearling, especially on sunny days or when the wind gets up her tail!!
May Tracey have many more happy hacking years as I remember my first pony being 28, that when I had him - he's probably still going stong now!! What is so heartening to hear is that you didn't pass her on, as so many people do, and you've found her a great home!!
Celebrate the oldies-but-youngies-at-heart!!