Big Paws Only Dog Forums

I just graduated from college in upstate NY and am moving to TX with my future wife and my two boys. I have a Bernese Mountain Dog (Bubba) and a Dachshund (Racer). They are best friends and love to play. I'm concerned about how Bubba is going to handle the heat in TX after living in upstate for all of his life, and the best way to make it comfortable for him. I've heard mixed advice on shaving Bernese that that their longer hair supposedly keeps them cool, but I can't see how that is possible. I already have him a cooling mat, kiddie pool, and many fans and ac units to cool the house, but wondering what else I can do for the guy to make the change easier on him.
Any advice is greatly appreciated.