In this case the wolf/dog that follows you to the nothern part would be another one from the logical view. But there is no location (a hole in the wall or something like that) where he might have come from. He just appears in a closed area.
But what really should be fixed in my opinion is the wolf suddenly disappearing.
Another point I noticed is that enemies always respawn at a specific location. When you catch a wolf inside one of those big yellow containers and even block the door after leaving and re-entering the area he is free again while the container is still closed and blocked. So it doesn't make any sense to catch enemies at all.