You are so right to watch the behavior of our pets. We had a Schnauzer that was my "everywhere" companion. He did it all, hunted, fished, rode motorcycle, to the office, etc. and was very well behaved and trained. One day, sitting at the computer he wet, right here in the house. He never did that! I also had noticed that he had been drinking a lot of water, but it had been a hot late June, so I blew it off as the heat. When he messed in the house, I knew we had a problem. Off we went to the Vet. He was diagnosed with diabetes. Yes, he got shots for the next 5 yrs. twice a day and it hurt me to do that. But, he didn't care, he always got a treat with a shot, so to him, it was well worth it. He lived to almost 14, I would have loved to have had more time, but I feel good knowing I did what I did helped us all live a longer better life.