Under normal circumstances, he might have been able to control the wolf to an extent. But for some unknown reason, today is not a normal day. Something is happening that's forced Oz's emotions into a spiral that does nothing to help control anything, let alone a feral monster hellbent on tasting blood.
The wolf's nostrils flare, a scent that Oz inside the wolf knows well, but a scent that the wolf wants to bathe in because with it comes blood and guts and muscle he can sink his teeth into. The wolf feels no fear right now as it hunches down and begins to creep toward her.