Ol' Josh seems to be one of those dogs that knows everything that is going on around him, all the time. Nothing seems to get by him and that includes the brush in your hand as you get ready to try and groom him. While Josh may seem to have a problem sitting still, with a little hard work and patience on your side, he will eventually learn to relax and enjoy being groomed. The big things to remember are to remain consistent and groom at the same day of the week and the same time, be patient, and make it fun.
Truth be told, Josh probably doesn't think much about the fact he needs to be groomed. He licks himself constantly, isn't that good enough? In reality, this really isn't anywhere near good enough. Which is why you need to work with him until he accepts the fact you will be grooming him every week.
Grooming an alert dog like Josh can be a bit challenging because he can't seem to remain focused. Keep your training sessions short at first and let him set the pace. By the time you are done, he will have learned to thoroughly enjoy being groomed and see it as his personal time to bond with you.