Feliway didn't see to make any difference to our 2 Siamese (now 10) when we tried it for various reasons over the years (spray/diffuser/different locations)
One of our old boys had surgery last week and was super-fearful...not eating...almost impossible to grab to give painkillers and antibiotics without stressing further....he was getting dangerously thin
I was initially researching Bachs Flower (felt sure I had some in the house....somewhere...knew it could be used on pets...not sure how) . I ended up ordering Pet Remedy diffuser. (Amazon delivered it to me on a Sunday!).
Maybe it is a coincidence; maybe our cat is no longer in pain....but wow!
Just to warn ChickenMe, our cats DEFINITELY knew I was pregnant before I did (they developed a slight obsession with trying to get in the bathroom with me...never lost it) and were terrified of me (even alone) when I came home with baby DD.
FWIW our little kittens spent a week on a shelf, venturing out to use the litter tray. We gave them plenty of space and let them decide whether to come to us for a couple of weeks. We couldn't wish for more personable cats. One insists on being carried about all day if possible and the other flops over your feet to get his tummy rubbed!
Less is more, when settling in tiny kittens