For those of you who have flown with your pets already, I'm getting ready to fly Bangkok, through Seoul, on to Chicago. With the layover, it's about 30 hours in the crate, do you arrive with a lot of mess, ie urine feces? Do they try to let the animals out during a layover? Also wondering if anyone had any experience with how lenient they are in weight when dogs are in cargo...going to be a close one with the water bottle, etc. thanks!