[SWN] Animals with Psychic Powers and Mad/Feral Psychics

In Stars Without Number, how do you handle animals with psychic powers? Give them a Discipline at a certain level and a pool of Psi-Points to use? Or do they have "free" use of their powers (as do "feral psychics" and madmen)? Also, how do you handle an NPC mad/"feral" Psychic who had the metadimensional energies burn a path through his mind? Can he simply use any power he knows as much as he wants (though only one activation per round)?

[SWN] Animals with Psychic Powers and Mad/Feral Psychics