Gorosk did not feel the regret Tracan clearly did.  They had been attacked by these creatures and had defended themselves.  Were they men perhaps their deaths could have been avoided, but they were not, they were angry base animals defending their territory.  Defending their territory oddly fiercely.  

"I don't go around hunting and killing rats," he said to the group as they gathered about in the aftermath of their first battles as a group, "But that was weird wasn't it?  That's not normal behavior for a rat."

He looks around at the 5 bodies, in various states but all equally dead.