Going back over time, I calculate that I've read and written about at least six different cat comics or children's graphic novel series on MADreads. This does not include a childhood spent reading Garfield. This does not include my recent (personal) purchasing and reading of the new "Grumpy Cat/Garfield" comic series. Who knew that Grumpy Cat and Garfield knew each other?!?!? It's an amazing world!! I guess what I'm trying to say is that there's a wealth of this kind of material out there and I celebrate it. All of it.
Chi's Sweet Home holds a special place in my heart. Sadly, that series has ended. For those who are unfamiliar with Chi, here's a review from 2014. I've since moved on to FukuFuku, a charming cat manga from the creator of Chi's Sweet Home. There are only two volumes, and they are in black and white, so that's a slight drawback. But the stories are heartwarming - FukuFuku's owner is an elderly woman who is alternately doting and exhausted by keeping a busy kitten well-fed, entertained, and happy. There's a nice article about FukuFuku on Comics Worth Reading, an independent review site.
Another series that I'm looking forward to reading more of is Plum Crazy!: Tales of a Tiger-Striped Cat. The library has the first volume, but there are sure to be more. Plum the cat is living a perfect life until a kitten named Snowball joins the family. There are outside adventures, a trip to school, some learning and growing - it's all adorable! Plum is published as traditional manga, read in panels from back to front, mostly right to left.
I wouldn't hesitate to recommend any or all of these for burgeoning comic and graphic novel readers, fans of cat manga or any human who appreciates the cuteness in life.