It's probably moles. We have them, too. Our cat -- and the neighbor's dog -- like them very much!
So we don't bother trying to chase them out.
The moles are there to eat the grubs. Moles love grubs.
This product is recommended to get rid of the moles:
http://www.dirtdoctor.com/organic/garde ... n/id/2401/Here's a link where you can learn more about moles, and hopefully the article will help you diagnose for certain whether it really is moles troubling you:
http://www.dirtdoctor.com/organic/garde ... ion/id/33/As a final tip, be sure to check out the Natural Organic Library (
http://www.dirtdoctor.com/organic/garden/faq/letter/M/). You can find lots of great information that will help you with your organic yard.
Hope that helps!
_________________
God speed!
Cara
**
Take time to stop and smell the flowers!
(or... as my ladybug refrigerator magnet says
"take time to stop and
eat the flowers!"
)