Quote Originally Posted by crazyboutanimals

Surprises in the hole: The Koehler dog method advocates filling holes with water and sticking dog's head under the water for a few seconds or so. This may not work with some breeds (e.g., Labradors), and may not appeal to you as a method to try.
OMG. I would definitely not encourage you to try that.

I had a feeling you had restrictions on the fence, so I guess my best suggestion would be to use some type of physical barrier to discourage digging rather than an aversive. I like the idea of lining chicken wire on the ground since you can't extend the fence below the ground. At the least, it'll give you 5 minutes of peace of mind (provided Ginger isn't a jumper )