Of course you should not. To ‘conceal’ a puppy would mean that you are hindering his/her breathing and suppressing the barking. I am assuming that you are concerned about flying with the puppy because airline restrictions can be tough. If the pup is under 6 months then some airlines will you allow you to bring him on board. If they are over 6 months, you can do what I did. Get some documentation that says that it is a service dog. By law you can take a service animal anywhere you want and it the questions that authorities can ask you are very limited.