LOL...I looked at the pics in the link you posted and burst out laughing at the one called "Too afraid". Silly me, a caption immediately entered my thoughts: "Are you KIDDING ME??? If that thing goes, at least I'm on the safe side". :P
With mixed breeds it can often be difficult to tell the actual breeds lurking within. Do admit though, I tend to think there's at least Catahoula and maybe some dane...at least, that's what I see. And what a gorgeous boy he is! I hope you continue to post photos of him.
btw, the animal shelter here in my city tends to be very generic when it comes to 'naming the breed mix'. Almost every dog passing through their doors for a while - if it had erect ears and a pointed snout - was 'shepherd/husky'. This is what they had told me my dog Kaya was, when I adopted her...but after living with her, and after comments from three different breeders of ACDs, I finally came to the conclusion that my girl was Cattle dog mixed with whoknowswhat. No matter what her true background was though, to me she was simply the best.