So..Ive got this problem..
I started modeling this today and now I'm stuck. I started modeling the back leg out of a subdiv cube and then attached it to the body connecting the vertices. Then I combined the two, and merged the vertices. I converted it to a polygon and went to clean up the polygons and clicked 'nonmanifold geometry' like I did with the front leg, so I could convert it back to a subdiv. When I converted it back all of a sudden I see this. I have no idea what happened and how to fix it. Has someone had this happen before? Can you help me please? I'd like to get back to working on this.