Pets (cats, dogs, ferrets) traveling with passengers to our country must comply with the following conditions:
Transit travelers passing through our country en route to another destination shall not be required to fulfill these conditions provided they do not enter our country. Compliance with the health requirements of the destination country shall suffice.
According to customs regulations, a passenger may travel with a maximum of 2 animals.
For detailed information, please refer to the Regulation on Animal Health Requirements for Non-Commercial Movements of Pet Animals.
https://www.resmigazete.gov.tr/eskiler/2011/12/20111205-3.htm