The "hair" is just texture maps. Useful as a base for dynamic hair. (Tiny made an add-on for the Milcat called Fluffy Cat. It uses dynamic hair over the DAZ texture maps. The product is still available at Hivewire.)

Or you could not use the texture maps, if you prefer.

The Hivewire cat poses very well, but I still prefer the old Milcat. The proportions of the head look more cat-like to me. The ears and forehead are too big on the Hivewire housecat, IMO.