Oh with the avacado and African Birds is a bit off. Avacado is toxic to all parrots regardless if there from Africa, Australia, South America, ect... Also Dogs are not affected by chocolate as badly as birds are with Avacado. Small amount of chocolate will not harm a dog and by small I mean a teaspoon or two with say a dog the size of a beagle. Another comparison would be dogs with Raisins or Avacado which is also toxic to dogs.
Hmmm onions are toxic to cats??? Wow that's good to know he he he. LOL. Never studied toxins which are harmful to cats but not humans. I don't like cats.
well i wasn't sure about all parrots and avocado but i knew for a fact that African parrots (should have said parrots in the first comment lol.) couldn't have it had to do research for a friend. but the cats and onions not so much toxic as indigestible their stomachs cant handle it, I don't know if it has anything to do with the high sulfur content.