Thank you for your light hearted replies, you've managed to put a smile on my face on what has been quite a frustrating day. One question though, I'm not sure I can fit a dog in there to get rid of the hairless cat so should I just leave it next to the camera to grab the cat when it comes out?
A bit more info for those who asked. I'm camping at the moment and it has rained almost constantly. The camera has been left in the car when not in use. I brought it out for some shots then put it down on a camp chair for about 30 mins while doing other things and when I came back there were ants inside. They hadn't nested inside, but I think it may have been their plan. It was the only thing around that was dry and warm.
I didn't want to go through Canon for cleaning them out, the time without my camera is not very desirable. But it may be the best way for piece of mind.
Thanks again for making me smile.