I'm a member of quite a few actually... its an addiction, I swear!

http://www.talkpets.com/forums/search.php?do=getdaily
Talk Pets

http://www.dogster.com/forums/
Dogster

http://theaustralianshepherd.net/aus...ch_id=newposts
Aussie Boards

http://www.dogdiscussion.com/search....ch_id=newposts
Dog Discussion

Dogster is pretty active and I am a mod there so I mostly oversee and don't post a lot. I like posting in the informative topics though like health and nutrition