I have a 4-5 month old BLRW, started walking like this all of a sudden 2 days ago. I see no other symptoms of illness, just this gait disturbance. I see no obvious trauma to his leg, I can't figure out what is wrong with him? What should I do? Here is a video, it is about one minute and 30 seconds long, he is walking alot at the end, thanks for any guidance..