On Tue, 03 Dec 2013 13:04:06 -0800, Oren wrote:

I'd hope the "retaining walls" have some rebar.

Dunno. But, I've belated learned the way to go is either to
put rodenticide in there (no more hugging 'dem critters); or,
to put the Mcabee trap (it hugs them for you).

Once I'm sure the rodent is gone, I can then continue on
with covering all my "lawns" with wood chips:
http://farm4.staticflickr.com/3789/1...ed786c90_o.gif