Hey man,
Here is my logo for your consideration: #5. I wanted it to be a strong emblem type design, so that it will look good across your client's entire brand (thinking about stamping things, like #6, or for use on shirts, vehicles, signage, etc.) It's clean and simple, but strong and eye-catching. I think the Bulldog fan in him will like it.
Let me know what you think. I will be happy to provide revisions as requested.
Thanks.