Rats

[chubba]

Time to buy one of these:
http://www.airsportdirect.com/acatalog/WeihrauchHW80.html

Every good contractor should have one for his ground staff.

 

[thunderlizard]

Terriers.
[taps pipe, takes off flat cap to wipe foam from top lip]
Best ratters this side of Ormskirk.

 

[chubba]

Those were the days, bag of ferrets and a couple of terriers, hours of fun.

 

[jimjamuk]

careful....

could be the start of an IR investigation! skulking round checking out your comings and goings