I apologize if someone already mentioned this, but did you book your pet flights BEFORE you had your pet passports and EU Health Certificates complete, signed by the USDA approved vet, and verified by the USDA, APHIS, VS office? (So essentially before the 10 day travel window countdown began.) Or did you have to wait until after? Or does it depend on the airline? We are flying from Newark, NJ to Heathrow in the beginning of July. We've already had our two cats rechipped and revaccinated, but we are not sure about the rest of the documentation.
Many thanks!