Puppies or kittens that have been weaned (no longer suckling from the mother) can easily travel together inside a crate. If they are transported together in the same crate, they must be from the same litter, may be no more than six months old, not weigh more than 14 kilograms each, and no more than three animals may be transported per crate. Please note that each airline or country of destination may have different rules governing multiple pets in the same crate. Certain national regulations stipulate that cats and dogs must be transported individually unless they belong to the same litter, are more than 8 weeks old, and traveling with the mother.
No more than two adult animals of similar size, weighing up to 14 kilograms each, may share the same crate provided they are of the same species and are used to being together. Pets weighing more than 14 kilograms must be transported individually.
Cats and dogs must never be transported together in the same crate.