Hi, I have been using a plug in feliway to introduce my to cats to each other.
Obviously I dont have any scientific evidence but, yeah I think it works it has been just over a week since I got my 2nd cat and they are already very relaxed with each other.
I have it plugged in by my bedroom door and they are more drawn to that room than the others but that could be coz they want my bed lol No, I dont think it has any effects on us its been plugged in almost non stop for the last 12 days.
Hope this helps
ps what puppy have you got???