Most likely is was one of your cats, I would guess that your dog wouldn't go in the crate to pee if he was desperate because afteral most dogs/pups have to be pretty desperate to go in their own den and that's only because they are locked in and have no choice, so he would more likely accidently...
My 5 yr cat has started lying down sometimes to drink and eat.....could she be just going through a phrase and is just being lazy? We've had her since she was 8 weeks old and has only started doing this the last month or so...she doesn't appear unwell, she's eating fine.
Just wondering what...
