[QUOTE=red mares;5755798]
I have found that a Feliway diffuser does help settle them down. I can tell when the screaming starts, it’s time for a refill.[/QUOTE]
I had a wacko Siamese that I adopted at the shelter as he was being delivered - was hoped to be fine since we only had dogs and no other cats. He marked a new couch, and regularly marked in ALL ways on our beds. The diffuser worked temporarily, but when it ran out, it got worse and he never improved. He eventually found another home, but that made me wary of them…
I trim Ricky’s (orange Maine Coon mix) feet by wrapping him in a towel, with only his head (not always!) showing, and the subject paw, and just use nail clippers.
And I have a squirt bottle upstairs and downstairs right next to me - all I have to do is reach for it, and he’s gone…