The species I'm considering are Pionus, Alexandrian, Ring neck, Superb (Barraband) or Mustache parakeet. My family had budgies when I was a kid. When one of them was deaf and albino that my brother bred, I kept him by himself in my room. Question: Are there hardened cages that are cat-proof. Yes, they can be separated. We had 3 cats with the budgies without issues when I was a kid.