I’m sure she did think that mailing the dog that way was more convenient for her. However, she was also apparently aware that one could not mail animals in that manner, hence, the lie.
“she was also apparently aware that one could not mail animals in that manner”
Yes, but that doesn’t mean she understood why. She may’ve figured they’re just doing something that makes it more expensive. And that there really isn’t much difference between the handling.
Again, to whom was she mailing the dog? Was there a person expecting something? Was it supposed to be a surprise for someone (no, not of the “Fatal Attraction” or “Godfather” type)?