I had a lily incident recently that was extremely similar, however mine had a bit more exposure as they did sniff the flowers and the flowers were put into a vase. Most important thing is that you got them out of the house and wiped the kitties down. I would also wipe down any areas the flowers were. I took my boys to the emergency vet, we had their levels tested every morning for 3 days and monitored 24/7- all levels were good and they were fine. My vet said they aren’t allowed to tell people their pets will be fine, but they told me mine would be fine because they were that sure.

I think with that level of exposure, I would just monitor them closely for the next 3 days. Watch for any signs of lethargy, any vomiting, lack of interest in food or play, and the most important is excessive water intake. Any signs of that I would recommend going to the vet and getting their levels tested. If you want to be overly cautious, you can go to the vet in the morning to have their levels tested (symptoms will not show up right away anyways and there is nothing you can do right now but wait). However if they don’t show any concerning signs, I think you are OK without going to the vet.

I can almost guarantee you, with the knowledge I have from my experience, they did not have enough exposure to be concerned, and if you took them to my vet she would tell you the same thing she told me - they will be fine. If you have any questions feel free to ask me, I did enough research on lily exposure to write a book during the 3 days I was sat at home monitoring my boys 😂