Just thought I'd give you folks a little closure.

First, I'm happy to say that the two of them are living together
in relative peace now, and that Tigger is no longer sequestered
in the back bedroom.  They don't interact much, but that includes
not getting into fights left, right and center.

Second, I'm neither happy nor unhappy to say that I went to the
vet and got some medicine to put between their shoulder blades.
It works on the same principle as Hartz Ultraguard, but it's
much more potent.  There's a chance that it's actually going to
work.  I'll keep you posted.

Finally, I'm unhappy to say that I haven't heard from Pete, who
technically owns Tigger, in over a month.  I've phoned him on
several occasions, only to get a voice mail every time, and
never to have him call back.  Looks like Tigger may be with me
for a LITTLE BIT of time...

...and I don't mind in the least.  :)  :)  :)

Jeff