Got it! Our cats are up to date, so I'm sure they will be fine, but I'm getting concerned on the timeframe!! So, if I can combine trips that is better for me! One other question for the actual shipping of the cats, who sets the guidelines on how big the kennel has to be?? We live in Iowa and hope to get a flight directly out of here, but that would require a stopover which makes me nervous since they are going to be shipped unaccompanied before we leave. So if anyone has any info on how to ship them ahead of time and knows about the requirements or where to find them, that would be awesome! Thanks everyone!