If Shepard assists Ratch with killing some vermin, free Pyjak Meat becomes available from Ratch's Wares and can be fed to Urz. After devouring the meat, Urz will start following Shepard around the camp and may be entered into the varren pit fight. Urz was a former champion pit fighter, and as such he has a high probability of winning and a corresponding higher bet: 500 credits instead of 250.