The Czech Airlines pet policy is as follows:
Only dogs and cats may be transported in the aircraft cabin.
The maximum size of the crate must not exceed 43 x 30 x 27cm (length, width, height); its maximum weight including the animal must not exceed 8kg.
Dogs and cats can be transported in the airplane hold as a checked baggage.
The maximum size of the crate must not exceed 130 x 69 x 80cm (length, width, height) and its weight including the animal must not exceed 32kg.
If it is technically possible, animals of a total weight in excess of 32kg including the transport crate and other animal species than listed above will be transported as cargo consignments for a fee.
Taking a pet to a foreign country involves preparation and planning far in advance of your departure date. Requirements for pet travel to a foreign country are set by the destination country. If you are you traveling to another country and bringing along your pet you’ll need to meet the animal health requirements of the country you are visiting.
More information on the Czech Airlines pet policy