Actually, a post started for cute stories or pictures, yeah, you started it, it is appropriate to come on and say something like, "Wow, what great stories! Thanks, these made my day."
But you don't have to respond to each one or every day. And you can give it up, even if the thread takes on a life of its own. That's up to you.
As for advice, not everyone comes on every day. Lots to do, all the time, and everyone is a GSD-junkie in different measures. So, responding days after the fact is fine. Sometimes, you can give a synopsis of what you are going to try, and then you can let the thread go for a while, and come back with how that worked.
Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.