Dog flu is a different disease from the human flu, and it spreads where dogs gather.
How the vaccine rule works
One vaccine covers both strains. The first dose starts the series, and a booster follows in 3 to 4 weeks. Happy Paws recommends the vaccine but does not require it to board. A dog that has started the series is accepted after the initial dose, and the booster should not be missed. After the series, it is given once a year. The record must stay current through the last day of the stay. See do you require the canine flu vaccine.
Why a kennel cares
Canine influenza spreads by droplets and shared objects, and any place where dogs meet is a place it can travel. Signs resemble kennel cough: cough, sneezing, nasal discharge, fever and tiredness. A dog can spread it before showing signs. A kennel therefore recommends the vaccine for every guest, which also protects your dog from other guests.
Planning the timeline
Because of the booster gap, start early. If your first dose is three weeks before a trip, the booster falls just before the stay. Ask your vet for dates in writing, and send the record when you book. The how far ahead to vaccinate page has a simple calendar.
More information
Read canine influenza, CIRDC and boarding and kennel cough risk. The AVMA has a pet owner page on the disease.
Signs and what to do
Watch for a cough that lasts, nasal discharge, sneezing, a fever and low energy. Some dogs have a mild illness and others develop pneumonia, so call your vet if breathing changes. A dog that shows signs should stay home from boarding and day care until the vet says he is clear. The vaccine does not guarantee that a dog will not catch the flu but it reduces the illness.
Keep the vaccine record with your other paperwork. Because the booster is part of the rule, ask your vet to write both dates on the record when the first dose is given.
Dog parks, day care and travel
Any outing with other dogs is a chance to meet the virus, which is why vets often suggest the vaccine for dogs that visit day care, boarding, shows or dog parks. If your dog travels, ask your vet whether the destination has had outbreaks. Keep the proof of both doses in your phone so you can send it on the day you book.