* {{Anvilicious}} -- Comic about the equivalent of an interracial couple. So, yeah, it's gonna happen.
* ArchiveBinge[=/=]ArchivePanic -- Going back to ''1995'', this is one of the longest-running webcomics with over 5000 strips and still counting. [[strike:Nearly]] OVER 19 years of DAILY strips.... You don't need to read the full archive to understand the newer strips but you have to read them if you want to get the full story.
* ArtisticLicenseBiology:
** As Holbrook said several times on the mailing list, "[[MST3KMantra If you can accept a six-foot tall bipedal talking rabbit and his daughter being a half-wolf, the rest should be no problem]]".
* AssPull: the recent "Kevin getting a recall election," storyline, starting [[http://www.kevinandkell.com/2011/kk0608.html here.]] The whole thing is built up so that all rabbits are divided on how the ears are portrayed- ears up is one side, and ears down is the other. Both sides hate each other with the same vitriol as opposing political viewpoints. Kevin has one ear up and one ear down. So Bill Holbrook has the option of either going into a storyline that delves into politics and Kevin struggling to find compromise and balance in the system... or he could have every rabbit in the world suddenly have ears like Kevin with absolutely no explanation, getting him re-elected and preserving the Status Quo. [[http://www.kevinandkell.com/2011/kk0620.html Guess which one Holbrook went with.]]
* BoringInvincibleHero -- One review suggests that the main characters have become this, not in fighting style but that they will always succeed at whatever they do somehow. It surmises that this is because Holbrook has fallen in love with the characters and cannot bear to make them unhappy... which would seem to be supported by his extreme focus on the strip, even over his more profitable comics and endeavors.
* CriticalResearchFailure -- Lindesfarne's {{squick}} over Human!Martha's sweat. Several animal species perspire (including primates). Particularly egregious given that Lindesfarne is a biologist and should've already have known what sweat was.
** This crops up constantly, such as the fact that Bill Holbrook does not know the difference between a hedgehog and a porcupine. He basically knows as much about animals in general as StanLee knew about [[SpiderMan spiders]].
* GeniusBonus:
** In [[http://www.kevinandkell.com/2000/kk1218.html this comic]], Coney is losing marks for not sharing her meals by regurgitating them. Most people would find this funny due to the idea of the rabbit being greedy, but the thing is, rabbits are physically unable to vomit, meaning that she literally cannot share her meals by regurgitating them.
** Also the mole scientist named Avagadro: in chemistry, Avagadro's Number is the number of molecules in a [[http://en.wikipedia.org/wiki/Mole_%28unit%29 mole]].
* HarsherInHindsight:
** [[http://kevinandkell.com/2001/kk0217.html This strip]] falls under this trope when it's realized that, as a former human, [[http://blog.kevinandkell.com/archives/195-DEALING-WITH-THE-FUTURE.html any children Lindesfarne bears would probably be human]] - which makes it unlikely her great-grandchildren would be hedgehogs.
** Related to this, any references to diapering flying hedgehogs.
* InternetBackdraft -- The entire Danielle saga caused massive flame wars on the Kevin and Kell mailing list. Even Danielle making a one shot appearance will send them into a furor. This fan reaction is credited for the strip abandoning the long-running, complicated serial plots it had relied on for much of its existence.
* ItWasHisSled -- The Great Bird Conspiracy, that they ran the world until they gave it up.
** Getting to this trope is that Lindesfarne and Danielle are former humans.
* MisaimedFandom -- Surprisingly, the comic really does make some fans appreciate the world we live in a lot more. (Mostly because RealLife could be a hell of a lot worse.)
* MST3KMantra:
** Kind of required, or else half of everyone in the comic would look like a homicidal sociopath. Would be easier to maintain if not for the below-noted ProtagonistCenteredMorality.
** Suggested in the "unofficial" FAQ in a question about [[http://www.kevinandkell.com/about/faq.html#4.5 the existence of Santa Claus and the Easter Bunny]]. Also invokes RuleOfFunny.
** Plus, apparently it's illegal to kill someone unless you eat them afterwards.
* StrangledByTheRedString -- Rhonda dumps Edgar, a character she had been dating exclusively for much of her history in the strip, for Quinn, a character the readers have just met, has had no build-up at all, and its supposed to be "true love". Even more distressing is that this is also Rhonda's final storyline, as the marriage served to [[PutOnABus put her on a bus]].
* TheyWastedAPerfectlyGoodPlot -- Lindesfarne and Fenton's wedding, which was the culmination of roughly a decade of the strip's history, should have been an occasion to show off the entire diverse cast over the years and highlight the much-anticipated union of two characters who had been dating since the strip's earliest years. Instead, the entire thing was derailed to introduce and glorify Fenton's mother, Desdemona, a brand-new character, and the entire plot was hijacked to focus on the bigotry she faced as a vampire bat. Not shockingly, this was also the ''first'' time vampire bats or bigotry against them was revealed. While a handful of long-unseen characters poked their heads in once or twice, the majority of the plot was focused on Desdemona and nothing else (not even how her ''son'' might take the news that his mother had essentially lied to him his entire life, or how ''he'' might be reacting to being part vampire bat). For one more kick in the pants, you're twice as likely to see Desdemona in a strip now than either Fenton ''or'' Lindesfarne.