Squirrel montage collages

Just a quickie today,  My squirrels have been spending quite a lot of time in the owl squirrel box recently. They can usually be found in it when it rains and spend most nights in it at the moment.

I've been playing with the photo collage tool in Picassa, and have made these 'delightful' montages.  My wife thinks that one of them isn't suitable for my work desktop background, see if you can figure out which one it is.

Squirrel Montage 1

Squirrel Montage 2

I've linked to high res versions of these if you too want to offend your work colleagues.