I'm sure Doomkitty just needs love as well. That's how cats are. :)

Also, I believe Wolverkitty is indeed supposed to be jumping dramatically. I can see the belly rub angle too, and it makes it way more adorable. Honestly, first glance, I thought he was trying to pounce on Stormkitty. :D Or maybe M.O.D.O.Kitty.