Why are they called the 30 Rock Kittens?

I had seen a picture of a cat on the internet whose name was Liz Lemon, after Tina Fey's character on 30 Rock, so that gave me the idea to name my foster kittens after 30 Rock characters. It seemed appropriate, too (this was before Tracy Morgan's controversial anti-gay rant), since there are two female kittens (Liz and Jenna) and three male kittens (Kenneth, Jack, and Tracy). Liz is actually the runt and had lots of trouble eating and keeping clean at the beginning, though she has plenty of energy now and is catching up to the others in all aspects.

Foster Kitten Liz Lemon