Isaac had caught the blood-scent on the air first, and it had attracted his attention. He'd collapsed the burrow of some small mutant rodents earlier and dug them out for a snack, but they weren't even full mouthfuls so he was still hungry.

And not really very cautious at all, though he kept upwind and his pawsteps mostly quiet--the branch that caught in his fur was not so quiet when it snapped but oh well--because he didn't pause out of sight and instead trotted right into view.

Of course even this far out he would run into a person. His first guess on seeing Nepeta was that she was one of the transports, and his last encounter left him with a nasty cut that's only barely healed. Even the fur on that shoulder was thin and spotty over the new scar. So Isaac went equally wary, but was careful to make no threatening moves. Hopefully he could stop this encounter without violence...