Greek yogurt (plain)

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  Safe
  Often OK; typically lower lactose. Prefer plain.
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• 

  Treat
  Lower lactose may be easier to tolerate, but still offer only tiny amounts.
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• 

  Avoid
  Dairy is not appropriate for rabbits.
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• 

  Treat
  Greek yogurt may be slightly lower in lactose, but parrots should still get only tiny occasional amounts.
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Sources

• VCA: Feeding Quaker or Monk Parakeets
• VCA: Feeding Meyer's Parrots
• AKC: Can Dogs Eat Yogurt?
• Cornell Feline Health Center: Feeding Your Cat
• House Rabbit Society: Treat Your Bunny Right