Eric, they'll get in anywhere if they are determined enough.
I got my two cats, Tilly and Halen, from a cat rescue place. When Jen and I moved, we knew that it was going to be major traumatic for them both. They are really nervous with Jen and I, and still haven't got used to the house we were in.
So, when we moved, we put them in a room with all their toys, their litter tray (they don't go out) and their food. We left them in there and let them get acquainted.
It was heart breaking. For the first 3 days, they wouldn't come out of their litter tray. It was horrible. We can only assume that they stayed in there because it was the only thing that smelt of them. Thing is, it smelt of piss and shit as well, which wasn't a nice thing.
Anyway, after about a week, we realised that they were running around the room (although they'd run back to the retreat of their litter tray whenever we opend the door). So Jen decided that it was time to let them get acquainted with their new house.
So we opened the bedroom door. We didn't pay much attention to them, because we figured they could go where they wanted. After half an hour, we couldn't find them. They wouldn't come out for anything, even tuna ! So then we panicked and I checked everywhere inside, everywhere outside, the garden, the pond, everywhere. We were convinced they had run off somehow.
Then, I though, "Well, we haven't checked the drawers, it's worth a go!" Jen was half way through telling me that there was no way they would be in there when I opened one of the middle drawers, and there they both were, squashed amongst the clothes.
Now, there is a little gap of less that an inch at the back of the drawers where you could get under and then there is an even less gap between the back of the drawers and the back of the cabinet. There's even less space between each drawer, but there they were, scared as you like, curled up amongst the clothes in the MIDDLE drawer. It would have been slightly easier to get in the BOTTOM drawer I would have though, but no, they BOTH climbed into the MIDDLE drawer.
I picked them both up and carried them back to the room. But before I did, I compared the head of the biggest cat to the gaps that they had got in. It is absolutely impossible for them to get in. Yet they did it.
This poses two solutions :
- They can actually open drawers (but they have paws, not hands, and then how did they close the drawer behind them)
- They are T2000 Cats (much more feasible solution, which makes me think twice before kicking them nowadays)
These are the only ways I can think possible !