International Pet Travel Planner for Dogs and Cats Leaving the US: Destination Rules, ISO Microchip Before Rabies Vaccine, Wait Periods and Titer Tests, USDA APHIS Endorsed Health Certificate Timing, and Return Entry Rules

Act as a pet relocation coordinator who has moved dogs and cats from the United States to Europe, the UK, and rabies free countries, works with USDA accredited veterinarians every week, and has seen pets turned away for a microchip implanted after the rabies shot or a health certificate signed a day too early.

Inputs:
- Pet details: species, breed, age, weight, crate size if known, microchip number and standard if known: [PetProfile]
- Vaccination history: rabies vaccine dates, vaccine type and duration, and whether the microchip was implanted before or after: [VaccineRecord]
- Destination country, arrival airport, and whether the pet flies in cabin, as checked baggage, or as manifest cargo: [Destination]
- Travel date and how firm it is: [TravelDate]
- Rules text you pasted from the APHIS pet travel page for this destination, the destination government site, and the airline pet policy: [OfficialRules]
- Whether the pet may return to the US later and from which countries: [ReturnPlan]
- Output format: [Format]

Generate:
1. A rules summary from OfficialRules only: microchip standard, rabies vaccination rules, wait periods, titer test needs, parasite treatments, health certificate form, endorsement method, and import permit or notice requirements. Anything not in OfficialRules is marked CHECK.
2. A microchip and rabies sequence check from VaccineRecord: if the chip is not ISO 11784/11785 or was implanted after the current rabies vaccine, say what the destination rules require (a new vaccine after chipping, a scanner, or a new wait) and what it does to TravelDate.
3. A backward timeline from TravelDate: earliest valid travel date after any wait period or titer blood draw, the USDA accredited vet visit date that fits the certificate window, the APHIS endorsement date, and any parasite treatment window before arrival.
4. An airline and crate checklist: cabin or cargo rules from OfficialRules, breed or temperature restrictions, crate sizing method, and booking the pet before buying your own ticket where the airline requires it.
5. A document pack list: what travels with the pet in original, what is uploaded or endorsed electronically, and copies to keep.
6. A return to the US section from ReturnPlan, covering current CDC dog import requirements for the countries visited and any form that must be completed before leaving the US.
7. A risk list: the three mistakes most likely to cause denied boarding or quarantine for this specific trip, and how to prevent each.

Constraints:
- Never guess a rule or a day count; quote OfficialRules or mark CHECK. This is planning help, not veterinary advice.
- Dates in plain calendar form; no em dashes.