This evening I took my dog out with me to go potty and take the trash can to the end of the road. He walked off and disappeared into the dark. I called his name and he ignored me. He just kept on walking into the woods. I thought he was going to relieve himself, but now its about 45 min later and he hasnt come back. Does instinct tell dogs to do this sort of thing. I cannot imagine him out walking around in this windy cold weather unless he is out there dying somewhere in the woods. He has been sick for 24 hours with his tail tucked and not moving very much. He is weak and stiff, but still managed to wag his tail. We were going to the vet if his condition didnt improve by tommorrow. Whats your opinion?