Hello,
i think it will to be good to change that when it stand a animal that i can not build a building and i need to find all the time a place to build it, well the animal have pleasure to stand still.
Kill them!
You when you will make a barracks in the late game or the enemy attck you and you will make a tower you didnt can build.
When you kill it you didnt can build 
Have you ever tried to lure it away?
The method is simple:
You attack that animal with a unit and then you send your unit back. It will chase him.
i dont mean this, my problem is with the buildings that dosent can build there where is a animal.