 We highly recommend that they are fully vaccinated with their Bordetella vaccine, their influenza vaccine, at least 10 days before they go to a boarding facility. Dr. Peter Eag, owner of Pool Veterinarian Clinic in Maryland, says it takes 7 to 14 days for your pets to become fully immune. Ask the boarding facility, what vaccinations do you require? And if they say, we don't require any vaccinations, that's a red flag. You don't want to go there. Dr. Eag says your pets should have routine evaluations, bring your own food and water, and check out the facility.