We adopted a “special needs” kitten from a local shelter - breathing problems. She was…

Good for you for taking on this special little girl! I have not had any experience in cats with nasal stents and it is my understanding they have just recently been used more commonly by surgeons and written up. One of my first thoughts would be to talk to the surgeon about their experience. Could it be possible this is still post-op inflammation? I would also be concerned about a bacterial infection...has any discharge been cultured? I would also wonder about an ongoing herpes virus infection. It sounds like you're in great hands and already I can tell you adore this little kitten. Keep us posted...I'd be interested to hear how your little one does.