BAHA may say 14 days but there is another consideration. The Airline you use. I use Continental and this is what they say. I believe it is the same for all because it is controlled by the USDA.
Procedures for Animal Shippers
Continental handles all specialty shipments, especially pets, with the greatest care. We understand the special requirements of shipping animals, and we adhere to the U.S. Department of Agriculture (USDA) regulations, as well as International Air Transport Association (IATA) regulations.
To further ensure the safety of animals when they travel on Continental, we require animal shippers to follow these guidelines:
For QUICKPAK service, pets must arrive at the QUICKPAK counter at least one hour prior to the scheduled flight's departure time. For international flights, pets must arrive at Continental's freight facility at least two hours prior to the flight's scheduled departure time.
Continental and the USDA require that your pet have a Health Certificate issued by a veterinarian dated within 10 days of travel for both the outbound and return trips.
I would suggest that you call your airline for other hints on traveling. Don't get too stressed. Once you have done it once it is not too bad. Dealing with BAHA was a little stressful because of communication but once you get them they are fine. I wanted the most time to get matters settled with BAHA but also wanted to build in a little leeway. I think I settled on 9 days because I was traveling in January and was afraid of weather delays at the airport. Pick up the phone and call BAHA if they do not answer your email. I used to have a contact and email but I'm not sure if it is still valid from what I've heard from others.
ps I'm assuming you are flying down.