I need help. My dog is a mix breed with German Shepard. He is just over a year old. For the past couple of days he has been acting funny. He shakes alot, like he is cold all the time, but he feels warm to the touch. Today he was he old playful self, but he has been panting like he is always out of breath. He also has to go to the bathroom alot more. I am really worried. What could this bee?