I've had the diffusor a week now, there's only been a slight difference. He can go short periods without the collar, but then he notices his tail and gets panicky. He hasn't attacked his tail again, but I think that's only because I keep such an eye on him and put the collar on when he is...
I had also heard about the anal glands, so I had that checked out. I will inquire about the product you recommended. I will try anything, but I am on a budget. I think amputating the tail would greatly reduce his stress, but that would cost over $400.00.
My male one year old cat has starting attacking it's own tail, to where it bleeds. He was on nuerotin, but that didn't seem to work. Now he is on alprazolam and amitryptyline. He has to wear a protective collar, which doesn't always keep him from biting his tail. The end of the tail is scabby...