Have you guys been getting the nonstop rain like we have for the last 2 weeks?
Boots is acting just like Eli. I think it's because of the weather. She doesn't
like to go out when the grass is wet, and I think she's frustrated.

Have you tried Feliway?

I'd suggest Hylands Calms Forte which you can get from a health food store.
I give it to 4 of our 5 cats and I think it helps some. I mush the tablet
into powder and mix it with yogurt or their kitty treats.  I've tried Rescue
Remedy but it didn't help us.  I'd also suggest trying to wear Eli out with
hard play sessions so he doesn't have as much interest in messing with the
other cats.  And if he gets out of line I'd put him in a short "time-out" in
another room.  Also try and give him kitty treats and the others treats when
they're in each other's presence and are getting along or at least not
fighting.  I have to keep a close eye on things in our household, too, as
Tucker is not liked much by the other cats in our house. Another possibility
also would be to check with your vet and see if there is an anti-anxiety med
that help.
Hope this helps.
Christine

Rescue remedy?

Pat, I've gone through this with Shamrock since day 1. It is
maddening isn't it!  ggggrrrrrrrr  Shamrock used to be a sh*t to
Shadow, and now he is to Bonnie.  I don't know what to do either. :(

Have you tried Feliway?