Must be! Pet World had a lot of non-feeders in the two clutches from Artyom's parents. All visual Anery het for... something, I can't decide what the dad is.
I imagine by now the non-feeders have either started and been sold or died off. Make sure the one you get out of there is a good weight, and ask for it's feeding records from the guy at the counter. He'll tell you how to fill it in etc if you buy it.