This rant comes from years of seeing Sue pets over many different fandoms which do not necessarily belong to real Sue OC's.  The OC's, however, tend to have some Sue qualities without being nauseating.  For simplicity, I'll use a cat for my example.  I own two cats IRL, and they are capable of doing surprisingly intelligent things...almost to the point of being creepy.  Most of the time, though?  They fall gracelessly off the top shelf of their cat tree because they're rolling around trying to look cute, spend hours trying to catch a little red ball of light on the floor, sit on the rim of the bathtub with their tails in the water and then wig out because their tails are wet, and refuse to stop chewing on power cords.  They also sit on the toilet or on top of the fridge and yowl at 2am, poop on my bed if I'm away for more than three weeks (I have a petsitter), barf only on the carpeted areas of the apartment, and scratch on the window screens.  

 

I understand the desire to make your pet smarter than the average bear and more special than the average unicorn, but how about throwing a few reality candy sprinkles on top of the sugary ball of fur?  Sure pets can be trained to do extraordinary things, and sometimes they do out of the world shit on their own.  But this is not a Meow Mix commercial, your cat is not going to leave a voicemail on your blackberry singing the themesong.  Nor is your cat going to wake you up in the middle of the night and lead you to the attic where your grandfather's old army pistol is hidden because there's some strange dude creeping around your rose bushes.  Yes, cats have amazing senses, and they can probably tell when you're about to go into insulin shock...but they're not going to dig through the pantry and bring you a cookie.

 

The pets are Sues.  Period.  Even in fandoms with cannon magic pets that are extraordinary, these superpets are Sues.  They may have unique and rare fur coloring instead of raven hair and violet eyes.  They always have an intimate connection with their owners that basically makes them telepathic; owner ponders the idea of beer, cat suddenly appears with beer for owner.  They don't have flaws unless it makes them look cute or cool, and they can materialize at the owner's side regardless of where they are to protect them from harm.  They invariably try to thread-jack the rp, and usually bring info back to their owner from threads they were never supposed to be in.  

 

The question is, does that make the OC owner of the superpet a Sue?  The owners I'm referring to are not blatant Sues themselves, but they do approach the fence and sometimes push on it without actually crossing into the sparklie pastures of Suedom.  Now, since they're already at the fence, does the Sue-pet push them over and define them as a Sue?  And what about the OC's who don't really have Sue qualities other than the Sue-pet?   

 
Edit for clarity:
I should have stated it, my bad.  =/  The pets aren't NPC's, they're actually owned by the OC.  For example: Annie is a rebel fighter in the "Scorpion King" universe, and she owns a pure white Burmese.  She's the only one who plays the cat.  She's trained it to carry secret messages to her allies across the desert, all she has to do is speak the name and the cat will find the person.  Since Annie's a spy herself the cat protects her from other assassins.  It is always at her side, and instinctively knows what to do in case of trouble.

 Now, Annie is a little Sue-ish, but her mun's not that bad of a player.  The cat, however...is just fucking irritating.  It's not a breed that even exists yet, the color is very uncommon, it's portrayed as basically super-human with just the physical feats it can accomplish without ever getting that pretty white coat dirty, it always knows just what Annie wants without her even having to say anything, etc, etc.  That's my gripe.  When used responsibly, superpets are tons of fun for all...but when their powers are abused it makes me want to stab that person in the face.  

The weird juxtaposition is that half the time Annie isn't really a Sue, it's her damn cat.  Since she's the one controlling the cat, does that make Annie a Sue?  Or just really bad at writing pets?  I guess I just wanted your thoughts on it, I don't really expect a "Yes, she IS!" or "No she ISN'T" definite answer.  It just gets me all kinds of pissed off when all I want to say is "You know...your OC would be pretty cool without that f*ing cat..."