Possibly. You are talking about tags to identiy the animal right? That is probably the same thing, since it's small, lightweight, and has no batteries to be replaced. It only needs to be activated whenever a reader is brought close to the chip beneath the animal's skin anyways.
I think the sub-derminal chips are lower range than what you might want though...unless the chip is in the cat's head. I think they require a reader to be passed by within cm of the chip (but that probably also has to do with the strength of the base station signal being generated).
I also added more detail to my previous response while you were replying. Added stuff about actual information being reradiated, rather than just reflecting the base station signal.