tttppp #r# #l# ### # O ### :dig=1 :name=Dig through just one layer? I saw a bug where a rabbot dug through two layers. He was also a climber. I'm not sure exactly the behavior required to reproduce this.
tttppp dl * ## #b #* O## # # :*=rk :*=yc :name=Perhaps this will reproduce it? Another version, more similar to where I saw this. No idea if either reproduces it though.