How many pets can travel in one pet carrier?

In the cabin (max. weight 8 kg):
 

• two adult animals or
• three max. 6-month- old animals from the same litter

In the hold of the aircraft:
 

• two adult animals of comparable size, up to 14 kg each or
• three max. 6-month- old animals from the same litter, up to 14 kg each