I just called BA World Cargo, they quoted me 600 GBP for freight from London Gatwick to Atlanta GA for both cats. Airpets (agency) quoted 880 GBP, but they include travel containers, 1 night boarding prior to flight, vet certificate, and airline handling fees. When I spoke to BA, they said Airpets is the BA preferred agency to work with. So I think I may just go with them, since I don't have much other choices. Thanks for all your help.