There is a fairly large group of people that I would consider the very active, then some who selectively post, and then you have the new people and the seasonal in and outs. Its rare that I don't see a post answered by several people.
In an unrelated factor for a while I thought you must of been a nutrition person because of your username. FOS stands for Fructooligosacchride. I've taken too many nutrition classes! Then I noticed it was your pups names!
Do you mean active on the forum? Or active as in fitness? lol. I'm a selective typer. I'll post on things I feel I can contribute to, or that I have an opinion on, or start threads for either info or something funny/interesting either my pooch has done or that has happened in my day.
Active as in fitness: Tessa and I average 6-10 km's run/walking a day, we hike our local coulees on the weekends and have been known to find ourselves out and about in Waterton Alberta on long weekends