The dog suddenly always drill to the corner

If the dog suddenly always goes to the corner, it is likely that it is frightened by some movement or people, you can ask people in the family to see if someone hit it, or was frightened by something. Excluding the above reasons, then perhaps the dog is sick, because most dogs, after being sick, like to hide in the corner, and where they think they have a sense of security. Under normal circumstances, the dog will only find a corner when sleeping, because the corner is relatively safe and quiet. When the dog suddenly repeatedly to the corner, there must be a reason, if the family recently came to the dog think strange people, may feel afraid or anxious, and then also not very willing to contact them, so they like to hide in the corner, it thinks only this way will have a sense of security.