A few years ago, BSU updated its sports logo. I've heard some people credit that revision with sparking the rise of BSU football. Both happened at roughly the same time, but it's hard to tie one to the other. Here is a version of the current logo.
Which is fine and all, but it has always struck me as pretty busy. Plus, it is very reminiscent of the Denver Bronco logo. Since the two teams have the same colors, differentiation of logos would be nice.
this link, you'll see a Google images page showing college football logos. Look them over and see if you don't agree that simpler is better.
A couple of logos that, to me, really stand out are Texas, and the Wyoming Cowboys. For some reason (probably some hidden google thing that prevents copyright infringement, or something) I can't grab and upload the logos. You can see Texas' here, and Wyoming's here. The Clemson Tiger paw print is also pretty cool.
My suggestion is to use the appaloosa as the basis for BSU's logo. I'm no artist, so you're just going to have to picture the appaloosas below in orange and blue, in some aggressive pose and looking angry, which for some reason seems to be a requirement of most mascots.