I don't know about technical proficiency, I wish I had stopped down to F8 and raised the ISO to get a bit more DOF for the right eye in the first and the nose in the second.
Luckily for me the cat is not mine but one of the many outdoor felines my in-laws have up in Warroad, Mn. I'm not a big fan of cats but do love trying to get some decent exposures of their eyes.
Tom, are you allergic?
Savagely so, Jake. Apparently its not so much the cat but what they carry on them which, when I discovered the extent of the fauna and flora beneath than languid look, I immediately realised we're not dealing with one animal here but a whole bloody zoo along with a botanic garden that would keep a micro-biologist busy for years.
Might I suggest instead of worrying about depth of field and get something with cross-hairs and in the calibre of .44
All fussing aside, I wouldn't loose any sleep over a miner glitch in DoF. It gives personal character to the images. Technical perfection is unattainable anyway and all it gives is everyone elses shot. You've done a good job here and have provided us with some shots we can enjoy and admire (and even joke about, just a bit). Sure, strive for what you want but enjoy what you have already.