if a bully to two cats, a bully to ALL cats?

@MommyofMany and others:  I take care of a feral cat colony.  In late October, a new cat (" Petey") joined the colony, and was so inordinately friendly, that after I got him neutered, I moved him into my friend's spare room in her house, where we have two other cats we are socializing in order to be placed into Forever Homes.  Petey is around three years old.  A reliable source told me Petey was abandoned by his owner in mid October.

Plain and simple, he is a bully, goes after "Buckley" and "Mystique" (male, female).  We had to put them in separate rooms.

BUT Petey is still super friendly, clingy, almost frantically so.  Lots of marking, some humping of my arm initially, purring 24x7.  I am puzzled as to why he is a bully to other cats, but so affectionate, clingy, not only to me but to my friend. 

Frankly I am loving his loving; my own precious cat is still timid, cautious, startled by loud noises, even after two years.  That said, she loves neck massages, lets me pet her belly sometimes, sleeps with me and lays on my lap.  But hates hates being picked up.

If Petey weren't such a bully, I'd adopt him myself.  Which brings me to my other question, slightly OT:  if a bully to two cats, a bully to ALL cats?

Thanks.

MOD, thanks for moving this thread.

And interestingly, Petey is uneasy around dogs (Trysh has three larges ones); Buckley and Mystique are fine with dogs.

As a further example of his, um, strong personality:  I put out a plate of food for Buckley and Petey to share, which they initially did.  But then Petey pushed Buckley out of the way.  So, I opened a separate can of food for Buckley and put it on a separate plate.  Buckley started to eat and then Petey went over the Buckley's plate and started to eat. 

From what I've read, it's up the cats--not humans--to decide pecking order.  The human can't really change that, at least, not without causing other problems.  I want to attribute human psychology to cats:  the reason Petey is a bully is because he is insecure.  If I build up his self-confidence, then he won't be a bully.  Any truth to that?  For what little time I will have with him, any suggestions?

Petey is coming over to my small one bedroom condo for much needed "face time"; Ritz will be in the bedroom.  (I have Feliway and gave Ritz a dose of Rescue Remedy.)  The only interaction I plan on is their smelling each other behind the door and giving each a treat on each side of the door.

My resident cat, Ritz (female, around 2.5 years old), is submissive, timid.  Did not interact with her litter mates much when being socialized by Trysh and myself (rescued at age of 5 months two years ago tomorrow).

I need Petey to come over to get him out of my system before he is adopted out into a Forever Home (only cat).  I think Petey is the right cat for me, the wrong cat for Ritz.  Darn it.

RAMF, yeah, there is submissive and then there is scardy cat submissive.  I think Ritz is the latter.I have to accept who she is and not try to change her.  Doesn't work for two legged people, why would it work for smarter four legged people:)

Ritz stayed under the bed by the wall, as far away from the door (and Petey) as she could get.  She stayed in the same spot the entire time Petey was here, even when I went in and took a nap and sat on the floor and read.  (She sleeps with me at nights and is a wonderful lap cat.)  Once Petey was gone, she came out fairly quickly and acted normally.  Ritz has been desensitized to smells of cats because I am around a LOT of cats through my volunteer activities with cats.  But she hasn't seen another cat for about two years.  Petey was a little more unsure of himself than I thought he'd be.  He did not really like the sound of people coming into the condo building and entering doors.  Then I remembered that he lived in a building identical to mine three months ago; a man about three buildings from mine abandoned him.  Petey hid under the sofa sometimes and came out sometimes.

I will be sad/happy when Petey is adopted into a Forever Home.  I want another cat, but it can't be Petey.  And it can't be now.

Thanks for the recommendation; I'll check it out.  I'm fascinated by cat psychology and hierachy, especially so because I take care of a feral/stray dumped cat colony.  I've seen the top cats change as the time passes.

Update.  Well, Ritz and Petey met, and no fur flew.  I had put Petey in the bedroom with the door closed, Ritz in the main room.  When I came back from running an errand, I saw both Ritz and Petey on top of the dining room table, perhaps in pursuit of one another.  There was hissing of course, but what I found surprising was Ritz seemed to be the pursuer, not Petey.  It was Petey who at one time hide under the sofa, not Ritz.  At one point, Petey was in front, Ritz behind, and Ritz smelled Petey's butt.  Petey turned around but other than that had no reaction.  I used balls and fuzzy mice as a distraction when I thought there would be trouble.  And treats when both were behaving themselves (defined as no hissing, just smelling).  Ritz kind of watched Petey's behavior; we both kind of rolled our eyes at Petey's reaction to cat nip.  (Ritz doesn't share in that, um, delight.)  When I thought Ritz had enough, I put Petey back in the bedroom.  Soon Ritz jumped on my lap.  And, yeah, five minutes later, Petey came out.  But I wanted at some point for Petey to see that Ritz was on my lap, that Ritz was top banana in my home.  Later when Ritz's hisses escalated into a growl, I picked up Petey and put him into a cat carrier.  Ritz saw me calmly pick up Petey, and Petey was very calm when I picked him up.  This is relevant because one of the reasons I want another cat is (unrealistically?) so the new cat can show Ritz that not all sounds are scary, and being picked up isn't a bad thing.

I may bring Petey back again this afternoon.  It will be interesting to see if Ritz remembers Petey, and vice versa; and what the level of acceptance is.

I am still of the mind that Petey is not the right second cat for Ritz.  But I am encouraged that perhaps Ritz would be accepting of another cat; before this, I had my doubts that she would accept any cat.