First of all, the security personnel may ask you to show your pet's certificate or related documents, such as veterinary inspection certificate, health certificate or transportation certificate. If you don't have these certificates or documents, the security personnel may refuse to let you take your pet through the security check. In some cases, the security personnel may also ask you to pay a fine.
Secondly, if you can show your pet's relevant certificates or documents, the security personnel may ask you to put your pet in the security instrument separately for inspection. In this case, you should cooperate with the security personnel as much as possible to ensure that pets and other items are inspected separately.
Finally, if you plan to take your pet by plane, you need to know the airline's policy in advance. Some airlines don't accept pets, and some airlines may ask you to buy extra air tickets to provide enough space for pets.
In short, traveling with pets is a good experience, but you must abide by relevant regulations and safety procedures. If you have any questions, please consult a doctor or related experts as soon as possible.