Here are the post requirements which change your user title and paw count.
0-39 posts - Newbie
40-74 posts - Junior Member
75-99 posts - Full Member
100-399 posts - Senior Member
400 + posts - God Member
After 1000 posts you can change your user title from the preset ones to something more personal.
Only certain areas of the forum increase your post count (eg General Cocker discussion/health/breeding/showing etc) the more 'fun' areas may not increase your post count.
Hope this helps.