No, you already did the DNA test for the one that could be confused. Not needed but since you did it already keep it handy in case someone asks.
They will need to be crated and travel at night. So you would drop them off then head to your plane. Depending on space and time of day the dogs may arrive later than you, maybe a day later in some cases. They will not transport them if too hot, they try to get them there at night or early morning hours. Maybe a midnight flight is the way to go for them and you.